I think adding PvP over all is a good thing. But not to the main game, but a side thing that people can do, like it was in 11, but maybe implement it a little better. (When i was there no one ever did PvP)

It will give people choice to do things over then just killing mobs. I like the posts about the Colosseum and stuff like that. Where you would be able to kill mobs or other players for some sort of reward at the end.