Well imo why the respec or be forced to respec, and i'm judging this opinion on doing half of zg at 62.  what happens is bosses tend to do lots of aoe damage around themselves and the raid wants to focus all heals on the MT, so if your there doing your dps on the baddie that does crazy aoe damage, your gonna die rather quickly since all the healers will be focusing on the tank.  so if you want to have a halfway decent repair bill when you finish a raid i suggest going either elemental or resto because you sure as hell aren't too much good if you are dead

Aeginne 65 elemental shaman Blades edge