It's amazing, but it needs only two mechanics. One, you should be able to make your characters automatically fight in a combat situation, because when I'm seen, I always get my guys killed because it's annoying to lock onto all the enemies. Two, you should be able to click to have your guys fire. Ok I also think you should be able to crouch and stand while walking, because after my sniper makes a shot and I have his movements planned out, he moves really slow and gets killed.
Otherwise, this game is fun, addictive, and challenging. Keep up the good work.