The change is quite simple: "remove ammo and fuel as separate resources. Weapons will consume materials directly, fuel engines and CJEs will burn materials directly".
Before I dig into why I think this is the right thing for FtD, I'd like to explain a few details.
Energy, fuel and ammo are still needed for your constructs.
We have changed the "ammo barrels (etc)" and "fuel tanks" so they are just alternative material storage containers, but with the following properties:
--"ammo barrels" now increase the maximum possible rate of usage of materials as "ammo" for reloading guns. They still explode.
--"fuel tanks" increase the maximum possible rate of use of materials as "fuel" for fuel engines and CJEs, with the future stretch goal of fuel tanks being flammable.
--So ammo racking is going to remain a feature of the game- vehicles that need to reload a large amount of materials may need additional ammo barrels
Ammo and oil processors are replaced ship-wide with existing material storage containers of the same size. They'll be made decorative blocks so you can still use them decoratively in future if you want to.
The oil refinery will be repurposed (described later in the patch notes)
There are two main reasons why I think this is the right move. Why it's right for the business and why it's right for the player.
Let's start with why I think it's right for the player:
Ammo and fuel containers are currently purchasable as either "empty or full". This is confusing when considered in the context of the campaign, story missions, custom battles, multiplayer matches...how do empty and full tanks behave in these modes? I'd need an hour to study the code and a small essay to explain it. That's not good game design.
Localised resources, when considering just the moving of material (and energy, if you want), becomes infinitely more manageable. The supply group system and the transit fleet system are not intuitive and for a lot of situations, their usage becomes fiddly and too complicated. We've replaced these systems with a new supply system that is much more intuitive for moving materials and energy around.
The UI is less cluttered now that ammo and fuel bars are not shown. This is not a minor point...it'll reduce the amount of data on screen by about 40% in a lot of the different views. It'll be so much easier to know at a glance if a particular fleet is running low on "materials" or doing fine. Is a transport ready to leave, or does it need to pick up more materials? Will a set of vehicles have enough materials for the next fight...this is so much easier with just one main resource type per vehicle.
When you or an enemy run out of ammo or fuel in a battle it's just frustrating. By combining fuel, ammo and materials for repairing you can guarantee that if someone runs out, the fight is going to be over quickly.
I imagine that deep down the majority of players would rather not have to create, stock and resupply fuel and ammo. I know that personally, the requirement to do this puts me off playing the campaign. By using a single material it still focuses the game on making efficient war machines, maintaining supply lines and growing your economy, but without the extra confusion of mat->ammo and mat-> fuel conversion.
Being able to assess weapons, engines and vehicles in terms of material cost and running cost is elegant.
Most grand strategy games and RTS games don't have localised resources, and many don't have more than 2 resource types to handle. Very few combine localised materials with multiple types.
Why it's right for the business:
The ammo and oil processors were created about 8 years ago. Boring single blocks that don't add much to the game. It's been our intention to add something similar to the oil refinery but for ammo creation. That's a lot of work and adds to the complexity of the logistical part of the game, which we feel is already a burden.
Making the localised resource supply system more user friendly to make it easy/natural/pleasant to move ammo, fuel and material around the map would require a lot of effort and, quite frankly, I'm not sure we'd ever manage it.
The complexity of the UI scares off a lot of our customers. The barriers to getting a gun firing or a boat moving will be lowered if a single material container can theoretically get everything working.
Running out of ammo/fuel in combat is a problem for our players. We want to find a solution to that, but it would take a lot of effort to do so. We also want the strategic AI to always enter a battle with enough ammo and fuel for the fight- that's another massive bunch of work.
The campaign's strategic AI has to work hard to get materials where it wants them. It's a bundle of work and added complexity to get NPC fleets to restock ammo and fuel as well.
We had proposed work to make resource dumps (from dead ships) contain ammo and fuel...again, that's more work, more bugs, more testing.
Certain game modes such as story missions, tournament mode, and multiplayer maps should theoretically allow the player to choose the amount of ammo or fuel stocked into their vehicles before the match begins. That's another bundle of work and added complexity we'd like to avoid.
Currently out of play units on the map can run out of fuel and will still continue to move "for free". It's exploitable and we don't have a solution to that...but if all the different out of play movement calculations are burning material, there will be no avoiding the cost.
The development effort can be much better spent polishing up other features that I actually believe in, rather than flogging the dead horse of logistical complexity in an attempt to make it interesting, approachable and fun for everyone (which I fundamentally don't think it would ever be).
Fundamentally I think that by winding back this feature we tie up a large number of loose ends and it results in a far more finished and enjoyable product.
And what's-more everyone on the development team agrees that we enjoy the game for fighting, looting and creating...not staring blankly at dozens of resource bars trying to figure out who needs to head back for more fuel and how long we need to wait for ammunition to process.
We've also simplified the resource transfer system. "Supply groups" and "Transit Fleets" have been replaced with a simple but comprehensive three-tier system. You can mark a vehicle as a "Creator", a "Cargo" or a "User". Creators fill up Cargos (and Users), Cargos give to Users (up to procurement levels). Users equalise their material with their neighbours, so do Creators, and there are a few handy transfers from Users back to Cargo and Creator to make sure they maintain their procurement levels as well. This system covers 95% of the way people were using the resource system and does it all semi-automatically. This simplification is much more possible now that materials are the only resource, as they invariably just need to flow from the resource zones to the front line, with everyone (Creators and Cargo) keeping what they need and passing the rest on. This new resource system also facilitates the long-range transport of materials from refinery to refinery, which is neat. The system also has an option, for Creator and Cargo types, to set their "supply chain index", so if you want to relay materials from output to output in order to accumulate them at a central location you can set the supply chain index to determine which way along the chain the materials will flow. It's all explained in the game.
Refineries on a force with greater than 1 million materials on it will begin refining the material into 'commodities' that are stored centrally. Commodities (AKA centralised materials) can be added by the player to any vehicle in allied territory, at any time.