Ya know what, I wouldn't mind the small grid so much if you allowed damage to carry over into the next slot. If they have only 2 points left in their armor, and I do a 20 point hit, 18 of those points should carry over to the next branch.
The length of some of these battles just doesn't correspond with the difficulty at all. Right now, I got nothing but mass Copters up above me killing everything before it can even get close to the castle and I don't even need to worry about it.
Its like I'm just waiting for the end rather then playing the game.