Don't worry, it'll be a long time before people are running around in that

And you won't need to have any fear of the preists, druids, and pallys/shamans in their T3, as they are pretty much healbot sets. The warrior T3 set isn't gonna do much for PvP either, but that 95dps mace will

(plus all the non-set items).
The rogue set graphics look a bit crappy
IMO, but it's got awesome stats, 40% crit chance here I come

Set bonuses are mostly useless for PvP, extra 5 energy on crits isn't gonna make any difference in PvP, and proc abilties are not controlable enough for PvP to make a difference
IMO, don't think I even need to metino the threat reduction

All the sets are gear to be awesome for PvE, it's not not set items that's gonna make PvP imba for most classes.