many players now have huge stocks of green (uncommon) and blue (rare), total numbers of these could be unfathomable total amounts if left sitting in bank/crafting bag.
so, why not use new "fusion" merging tempors to new refined tempors
most players sell to trash vendor for gold they need, some tried selling on auction house and it would take days or longer.
since Legendary are hard to get by.
the concept are about making new tempors
example, (please numbers are just rough draft)
10 green tempors and refine to new blue tempor, the repeat to next tier with 10 blue rares to new 1 purple tempor, and then limited per day refine 10 epics into 1 legendary tempor.
if we do have that and server will feel lot lighter and cleaner data instead of having massive overloaded data of tempors adding everyday