We did several little tests last night with a friend. I have some remarks. Being high, behind a cover is just too powerful. We only get hit on 6+ and block on 3+. Conversely, we respond to 3+! In each of the games, the tall characters completely unbalanced the game.
Another problem is the number. We chose to test two completely different bands. One of 10 miniatures with just one weapon and the other of 5 miniatures + armor + piercing ammunition. With 5 activations you end up being completely overwhelmed and the opponent can simply use 5 or 6 activations to go around the table with a figurine and arrive in the back of everyone and make a box with the last 4. So being more is too advantageous.
The game system is really nice, but we felt that something was missing to better balance the game.