For each of the last 6 or so expansions put in 1 quest. Each quest would require you attain each and every augment - or close to it - in that expansion. Upon attaining all of them you combine them to be rewarded 1 amazing special augment much more powerful than any 1 augment in that expansion. Adding more replay value to older content, plus considering the new herroic mod changes, I think some new quests liek this would be a good idea. *Looks in his bank at the horde of augments he has saved over the years* Muhuhahahaha
I guess you missed the time when they nerfed almost all the xp out of previous expansions because they didn't want people playing in old content.