An idea

Just had an idea for something I think would be great in D3 (sorry if this has been suggested)

Including some of the old sets from classes that aren't in the game anymore? Some uniques make it through the ages so there's nothing to say that some sets didn't survive, maybe turn them into a unique set which is difficult to obtain, the sets would be from extinct classes like Griswold's set & one of the bonuses could be a paladin aura, so effectively you gain an exclusive skill from the set or partial set bonus that none of the new classes have access to, or a Valkarie from M'avina's set, a curse from Trang-Oul's & so on.

I know this would be more mechanics & balancing but could work over all, plus would carry on some lore from heroes past