besides cursed/brittle/cant be repaired. those 3 need to stay to keep the rarity of good shame pieces high.
*speculation* but lookin thru one of the last patch files or whatever (one of rtravelers spoilers) It looks like they may overhaul runics and or crafters with some ability that resembles something like a "Shuffle" that would let them reroll a mod set or maybe even just one mod. of course thats all speculation and who knows if it would ever make it into game.
anyways, I think if they do it right they could make each revamped dungeon have some way of getting an item that removes one set mod (whetstone for each dungeon).
Then perhaps have a way to get one piece from each dungeon to make one super whetstone maybe have it have like 5 charges and each charge gives the ability to take off a mod of your choosing.
Also would love to see a new powder that could give a non exceptional item the extra 50 imbuing weight to make it on par with exceptional.