It seems like the theme for pvp is "tanky circle man". Everyone wants someone who is relatively hard to kill, who can bombard an area with tons of AOE, if you're not doing that, you're spinning as either a thief or a warrior as a wrecking ball.
I only own the base game, so i don't know much about the newer stuff. What i do know is that I literally bought this game and have played it for the GS+Rifle warrior because i think it is the most unique and fun thing to play out of any mmo i've ever played. And ive played a lot of MMO's.
So lets talk about what makes it bad, so that we can address it's weaknesses.