I don't blame anybody for rerolling to another server (I just see why people don't want to reroll to another server at this point, leveling without any legacy would be too frustrating for alot of people including me).
Bioware's in a really bad situation right now in how they're handling the servers, since because they are glacially slow at doing anything about it. For example, single server LFG might of worked when the game originally released, but right now it's going to do nothing, as most servers are too barren to support it.
edit. Just saw the world pvp question, world pvp only occured during the Rakghoul event (the quests were the same for both sides, otherwise the quests are way too apart). I would hate to be on the weaker side (most likely republic) on a pvp server in one of those events, if it's done the same.