I think an "open world" pvp zone like an open area in wolves den pier would be nice. In WoW, there used to be arenas out in the open world where, if you jumped inside, you would be flagged for pvp. It would be a total free for all, I'm not sure if parties were allowed but tbh I would not be against it. It doesn't have to be a perfectly balanced side activity, just something to do on the side. It would be great to just hop in for some casual pvp while still being able to chat or waiting for queue times etc.