There is something glitchy as fuck with the later Zones, too. I've seen 2500pt hits from the PC knock a full 7 card near perfect life bar to zero in one hit. Then it does it to the others, too. There is no way one round has invincible super soldiers able to do one hit kills on a maxed out team and then the next can't even register a dent in the life bar on my team.
I'm hoping my 5 SE will turn into something decent. I focus a lot on a good Cobra team, so Joe has fallen by the side of the road with nothing good for them in awhile.