I don't think people who are seriously into PvP are really into RotW right yet. I don't see a lot of duel games in NL RotW. Too many newbie idiots from D4 flocking around atm. It's not just that Warlock is insanely overtuned, it's the potential for future stupid changes that could further ruin PvP and most people who duel aren't interested in that. Sure is fun PKing these people with overtuned Warlocks though. inb4 Blizz decides to change how the hostile function works and forces 'pvp' zones onto us.
a lot of the pvp players also mf
this is first new content in years and its huge so expect pvp to take a back seat, there wont be many pub games.
That being said there are plenty of pvp discords with tournaments on every few days and pvp seems fine for all except there seems to be a lot of crashes in TVT
as far as new items go all new items are currently banned in legit pvp