To whom it may concern;
First off I would like to say that for a PvE game that added PvP, SE has done a very good job for their second installation of PvP (Frontlines; a Battle Ground Scenario), and I am looking forward to more PvP Scenarios.

I've played mostly PvP centered games. Dark Age of Camelot (Mordred: Sin Vida Represent!), Warhammer Online, and a handful of games that had PvP servers in them. The two I mentioned by name however are the most significant as they were Realm vs Relm games where PvP was center stage and PvE was secondary. These games had a several of challenges to overcome win the balancing of the the PvP between classes and such. But sense it was their focus they were mostly addressed quickly.