Just found another enhancement in the patch which isn't listed in your notes:

When trying to drag "Hair" onto "Hair" it pops up a Craft or Stack UI, so you can choose whether to...

That's great, and it's one step closer to the goal of a Craft UI which lets you drag things from your inventory into it to perform a craft. It's not there yet, you can't drag things onto there, in part because there's only the one ingredient slot, and the second slot shows the result of the craft - also a good thing.