I hate that I can’t give my Paladin a Unique shield I found with my Sorcerer. I don’t see any harm in adding a shared loot box like in D3.
there is though
it’s a shared stash it was added in diablo 2 R
(there is harm in it though for the market considering we now only 1 perfect annilhus , enigma etc… that we can transfer to each of our character in a few seconds even with only 1 computer , but it is there)