I can just see Competitive PvP teams practicing all kinds of combos and finishers, setting up callsigns and complex Tactics.
I dont know about this. With only seeing one map, I think pain trains are where it is going to be. Melee classes that can assist one another is going to be pretty powerful. I've read some that say all ranged would be tough and things like that, but pushing teams will have it all over kiting teams on that small map. I think the combination of stuns/knockdowns/immobilizes from melee will trump ranged combos.