I've been part of stronghold kingdoms since it's early alpha stages, back when there were only a few of us and we all knew each other like neighbors. Therefore I can say that this game is a massive waste of your time.
I see innovation here - a lot of it. I see opportunities to play stronghold like never before, with an MMO idea all taking place on a large map where cooperation and diplomacy are key to victory in the world of thousands of players all with their own individual strongholds they too are building. The game still has all the customization that stronghold offered you as well, placing the walls, towers, gatehouses, moats, spikes, and more all wherever you want to. It also gives you the freedom to train and manually deploy your own troops both defensively in your castle and/or offensively to siege another. In fact, at the time I began testing this game and for some time afterwards, it was unbelievably fun. But since then it's been squashed into a payment-heavy hunk of crap.
"Cards" in the game are used to boost what you can do with no limit to how many you can use, as long as you can afford to spend real world money to get them. On top of that, you require to buy premium subscriptions just to play the game properly, or you'll be logging in every hour to do something when nothing queues up properly. Cards can be earned for free, yes, but they take a long time and are fully randomized. You can earn more for free per week, but that is locked behind not one, but TWO paywalls of buying subscriptions to the game. You must buy TWO subscription tokens in order to unlock the full range of cards. On top of that, cards can still be bought with REAL WORLD MONEY after you ALREADY had to spend REAL WORLD MONEY on buying a PREMIUM SUBSCRIPTION just to play the game properly. This is massively unbalanced and, as is common among MOBILE COW CLICKERS, can take you from the bottom of the pack to #1 on the leaderboard in a matter of minutes should you pay enough money. Nobody will, but the fact that it is a possibility means the game is massively unbalanced. Any game that makes it possible to advance from bottom to top within minutes cannot be considered free to play.
Outside of that, the game itself is barebones. Your castle management becomes minimal, as the tiny map areas and massively limited resources for each "village" means you will not be able to customize the village to look as you please, it's going to have to run for maximum efficiency, followed by waiting through timers and resource walls as you wait for enough resources or an open queue slot to continue. This game also has an issue of expansion, due to the extreme number of players - castles/villages can only be built on predetermined slots, and the number of people in the game makes it very difficult to expand peacefully without spending an absolute fortune of gold and leaving your new towns well outside your support range. Production lines are also removed now, with the only actual production being from wood/iron -> weapons. That's it. All other production chains, no matter how simple, have been ditched. To help slow you down, each time you build something, it raises its own construction cost and also increases the time required to build the next structure. So, don't go too fast - buy our ♥♥♥♥ instead!
This game offers so much room for innovation in the stronghold series. It makes me want to see a stronghold game taking place on a large meta-map managing multiple castles against various AI opponents or players doing similar things, but not in this fashion. I want to see it in a microtransaction-free, upfront paid game with no multi-day timers or subsctipitions or ♥♥♥♥♥♥♥♥ like that. This franchise NEEDS innovation, and the ideas behind stronghold kingdoms if applied to a paid game could provide it. But this just isn't it. All it does is makes you want to go play another stronghold game instead.