Amazing feedback! Thank you very much.
I mostly agree on everything, especially on the pathfinding issue, we didn't have much time to implement that but I'm certain it would improve the game.
And yes, the expensive units do deal more damage, you are right that wasn't very clearly comunicated, again because of time. Maybe some attack number above the units or something like that would have helped with that.
We may update it in the future fixing those. Again thank you a lot for taking the time to write such a detailed review, it is really helpful :)