Blizzard has a bad reputation for world PVP. I'm not peticularly a pvp oriented person myself, however, I know that in the past blizzard has claimed that new implementations will make world PVP viable, it has yet to happen. It looks like they at least have a grasp at what the problems are now and are working to fix them but I wouldn't put any money on it.

Have you settled on a method of leveling? You've got a lot of toons to gear up and I wondered if you had a method in mind?