Seeing as I've never played an Action-MMORPG that wasn't horribly balanced in terms of both class balance and PvE/Raid encounters, I'd have to say no. I would even go as far as to say that it's impossible to properly balance a game like BDO and that no game ever will manage to do that; there's a reason why Bluehole Studio chose to go the tab-target route with their new project AIR instead of making another TERA.