I too have been playing for a few hours and do not see this problem. Yes we are limited to the new heroes on this game mode so you are limited to fewer options. I see both plants and zombies winning games. You might have just got into a room with people that play those characters is all. I love the fact that you cannot just sit in the back and wait for your mech lol you have to actually be getting assists at least to keep from going BOOM that's great.
Imp (specially Z7 imp) say hi.
I will note that I have been persistently freezing while trying to play this mode. Solid. No countdown timer. Xbox One.
