Eh, I’m not sure on this idea. My idea for PvP.

Each player gets a “blog”(can change the name), you can put whatever you want on it and such. Now where the PvP plays in is, you can take your blog up or down, if you put it up people can try to attack your blog(you will receive a “PvP request”Log in to see images!, if denied you take your blog down on the spot. If accepted you sTalk the player, and then the match plays out forum style. To make it interesting, make it so you get .moar files for winning, as well as adding some .moar files only available by PvP. Of course Emo Kids could dominate by using Life after Death. A possible solution would be to make a separate PvP skill tree with skills that can only be used in PvP.

TL;DR: Add a separate PvP skill tree, make PvP blog based, and give the option to accept PvP/Deny.