Only one hero per class allowed, fortunately.
No issues with RNG in single player, but it becomes a huge factor in this pvp format. Just lost against a mark team (basically a copy of my own). First enemy attack: 42hp crit on my musketeer. Second attack: deathblow. My own attacks: 3 deathblow resist in a row.
Obviously it can go in both directions, but it's not a good recipe for a competitive format.
Also, massive connectivity issues. So far I've been able to play one game and after that I get the "unable to communicate" error for a while, before being able to connect again.
EDIT 2: after a dozen or so matches, I can confirm the DLC in the current state is hot garbage. The format of this game is simply not suited for any form of balanced pvp.
Some mechanics should be removed or completely reworked: crits and virtues. Critical hits, as designed in darkest dungeon, don't belong to a respectable pvp format.
The virtues/affliction system don't make any sense, either. Building a team on virtue percentage is, well, undesirable, for obvious reasons. So there's this little chance of getting a virtue, always there. Random chance for a bonus while getting wrecked? Why? To punish to the other player for doing well? Most of the times you are getting a "nope, fuck you" anyway, so why keep that extra layer of RNG?
And mind you, I'm not one of "those" players. In 481 hours I've beaten this game with all sorts of team compositions and on all difficulty levels. RNG is not a deciding factor in single player. But it is the deciding factor in a significant percentage of pvp games.
Also, some skills need to be deleted and re-designed from scratch. Example n.1: bellow.