What about for one week everyone is purple and there is no xp penalty on pvp death? So everyone is forced to pvp, but also has no xp to loose. To make things dair for pure pve players,
a. Players below lvl 62 don't get pruple (unless they want to)
b. Leave few areas as peacezones (one area with lvl 65 mobs, one with lvl 72 and one with 78lvl mobs), where someone can xp in peace, while in all other areas you get puprle. For example AL, the rock in FoD and IT could be peacezones and everything else is pvp zones.
So someone who does not want to pvp, instead of not playing for a whole week, will be able to xp with his sub/lowbie toon or try the few peacezones.