I wish for a new money sinkhole related to crafting!
For example a "leveling" system for blacksmithing which increases the quality of crafted items. Similar to paragon levels :)) The leveling could be based on turn-ins of items like "Fiery Brimstone". That would also increase the price of useless epiqs in AH.
something similar. I was thinking a system where you could reroll a single affix on a given piece of gear at the cost of maybe 300k gold and 30 brimstones + 50 tears, the catch being that this makes the item account bound like the Hellfire. So rerolling once takes the item out of play and 30 legendaries with it, and the chance of getting a good stat are fairly low.
Expanding on the idea, item combining for a far higher cost in gold and brimstone, same as the reroll but instead it takes a random affix from a second item you include in the crafting and replaces it, destroying the original, say 45 to 50 legendaries worth of mats and binding the final product to prevent the AH being flooded with top rerolls/combinations. You could only merge with an item that fits in the same slot, so something like a compass rose, rather than being useless, is now a 1 in 6 chance to get 12% movement speed on your fav ring, providing you find another 45 junk legs to cover the crafting. It would change whats worth something, a 4 affix item with 2 really good rolls is now a valuable piece, even a single high stat like 10%cc on an amulet has value, people will be destroying them by the dozen trying to get that stat over to their best tal rasha. Items with unusual stats like lacunis, rose, mempo, andys etc will always have some value and will be being destroyed at ferocious rates.
Similar process can be used for this illusion dye people want, in order to make a vile ward look like a lvl63 shoulder or whatever, the smith for a price in brimstone and gold can make any bit of armour look like a piece he know show to craft, every time you salvage a legendary it adds that item to the list of potential model changes.
Its all designed to remove items from circulation, give even brimstone legendary drops some value and increase the type of items that we look for by making a single good stat on a rubbish item some potentially worth something, add variety to the items in use, did you add AS to your Triumph or did you add crit to your Mempo? How many legendaries did you salvage to do it? 100? 300? The ability for your blacksmith to do these things would be added at stages in the paragon system.