Blue Tracker: Heirlooms in Cataclysm

We're adding more heirlooms in Cataclysm. Though I've not yet seen much evidence of tank specific items, development of the new expansion pack isn't completed yet and some of the new heirlooms we add might end up being of particular note for tanks.

However so far we haven't really focused on making heirlooms fill all the gear slots nor have we tried to completely replace all the items you receive from quests and dungeons as you level up. So it might well be that we decide to continue staying away from filling some slots and addressing some itemisation niches with heirlooms deliberately to maintain the value of quest or dungeon rewards, thus also maintaining the value of completing quests and participating in dungeons while leveling up.