We need an additional inventory just for charms.

Wrong. Play pd2 if you want that... Charm/Inventory management has always been part of the game. I'm not even that much of a fan of the "currency" tab, but it's not that big of a deal, at least compared to your proposed idea.

i dont like pd2...

also u can still play d2r classic or expansion

You can also play d2 classic or lod legacy if you dont like QoL. Good ol click n drag into stash tab the size of a peanut

but i like and want more qol