Item Upgrades

It is getting to the point were items with +10 to a specific stat are getting devalued as monster level cap increases. Plus on top of that people have many copies of the same item. For example I have about 5 pairs of boots from farming ghost ABC. So why not implement a way for us to pay something like 100k silver and two pairs of boots to make new boots that give +15 speed? Then 200k and two pairs of +1 boots for a pair of +2 boots with 20 more speed?

I would like them to change the current item effects to Percentage instead and then add more items with different effects and not just stat increase.
E.G. An item that heals the user for 1/8 of it's health every turn.