This is not a 'X CHARACTER IS OP' thead !
I don't know if anybody noticed but I haven't heard anyone complain about the one and only real problem I'm having with the game (which i HOPE is only due to it being in BETA. If this problem persists in the full game, I will be very upset):
Whenever you play cooperatively with somebody online (not same system), you can never play more than one game without having to disband and re-invite each other (at which point we find a game within seconds).
You don't "have to" disband and then reparty up. Whoever is the party leader hits start, and you're still in the party. The only time it will ask you if you want to disband is if you're not the party leader and you hit start. Then it will ask you if you want to. If you accidentally hit start, then just choose no and wait for the party leade.
So no. What you're complaining about is not a problem.