With the introduce of the treasure hunting dungeons in 3.3 I think many will want to save up maps for when it releases, however, the maps are unique which make this hard.

Can we please have those timeworn maps no longer be Unique? Why were they made Unique in the first place anyway ??? I don't see anything game-breaking could happen if we make them stackable now, since you still can only have one every 18 hours.