I would drown this community in glyphs.
Would return profession enhancements that can be sold on the AH for everyone.
Any race any class.
Any armor (minus Tier) any class.
If that idea was shot down I would at least allow everyone to collect any type of armor/weapon instead of it needing to be who can equip what.
Torghast system is a side option in the form of the Caverns of Time.
General legacy currency that can be used as bad luck protection that lets folks purchase w/e they want from that a raid. You’ve been farming the Garrosh shoulders for 4 years you say? Well here is a currency to reward you for your dedication and to tend your sanity.