I've definitely put my shaman team down for a few days several times. Nothing worse than maxing out all non-collection quests, only to realize that they are necessary to get the rest of the quests in the area. I just leveled other teams. It'll be nice to have deathknights and druids anyways

When I came back to play my shamans 10-14 hours/level felt much more bearable, and I felt more rewarded for having opened up so many quests by doing the miserable collection quests (or figuring out how to box the vehicle quests...).