A poorly planned F2P model kills an otherwise interesting game. If you want a good experience you really need to spend money.
This game could have been interesting, but the F2P models is so poorly thought out that people will be put off from playing. It works like this. You start out with three random champions, that are on a random rotation, and you can unlock new champions for in-game credits (or real money). Sounds good so far? Sure... but it's gets bad real fast.
The moment you buy your first champion, you get only two random champions each day (and buying two gives you one random champion, and so on...), so basically you get to try out fewer champions, and get stuck with a narrower selection for your battles. This means that you may get in a situation where you have bought champions that don't mesh well together, and you will be ending up losing basically every game. You will also get matched up VS people who have bought a lot of champions, and will have the ability to change linup on the fly (since you can have six champions pool to choose from, but only three on the field at any given time), so even if you manage to have a selection of champions that work well vs a player, they will still be able to counter-pick, since they got access to a pool of up to six champions during a battle.
Well.... how about just playing the game and buying some heroes? Sure, you can. If you feel like it's fun to play for hours VS players who have bought heroes, and by that merit alone have a higher chance of winning.
However, that's not all. It gets worse. You can also buy "shells", shells that can be bought in two rarities. Normal and rare. Rare shells are often stronger, and some can have devastating effects on the game, and having a big supply of rare shells will increase your chances of winning. Players who already bought all champions can spend all the money they earn on shells. Players who wants to go the F2P-route, can't, because if they do, they will never be able to buy the champions they need, unless they want to spend hundreds of hours playing the game with poor chances of winning.
Obviously you can off-set all of this by being a "skilled player" but an even easier way to increase your win rate is by throwing in some cold hard cash. Spending money gives you flexibility in your play. It gives you rare shells and better types of ships (ships basically give you a resources/tactical advantage and some added flexibility).
To sum it up, you may like the gameplay, but the free to play model is one of the worst on the market, because unlike games like LOL & SMITE you're not just stuck with a limited amount of heroes, you're also stuck with a limited selection of ways to counter your opponent during play. In MOBA games you can buy the same items, and heroes are reasonably well balanced and possible to counter through item selection during game. In this game, you can't even get a decent item selection, because that means never being able to buy champions, and buying champions early on, makes it so that you'll get an even narrower selection of champions, and are even less likely to be able to counter your opponent.
What they need to do to fix this, is to allow players to ALWAYS have three champions on a rotating schedule, even if you buy more champions. The would allow F2P-users to always have three random champions, plus the ones you bought with in-game currency. You will still be at a disadvantage VS players who spent tons of cash, but it would at least give you A SLIGHT chance to counter your opponent, since you would at least have a minimum of FOUR champions to choose from during any game. It would also allow you to try most champions in the game, since you will always get new champions with the 3x champion free rotation. It would also allow players to be able to spend some credits on shells, since you wouldn't be as punishing for F2P-accounts to spend credits on shells, since they still get a decent selection of champions.
I would also like to see the developers add an option to straight out buy the whole game. I recommend that they go the smite route with and charge 25-40 euro for all current champions and ships and all future additions of champions and ships. This give people who just want to buy the game an option to do so, without having to deal with all the cash-shop nonsense. They could also support the game in the future by buying skins, shells, and what not.
Anyway. I won't be recommending this game unless they improve the F2P model. In fact, I'll actively work to discourage people from playing this game. The current model is harmful for consumers, and it's not fair play. It's practically a PAY2WIN game at this point, and that's real bad.