This is implemented and is awaiting release, see Reorder items in bulk
Recoreded as an idea to think about. There’s already :n - wouldn’t it work nearly as well? If I understand correctly, the proposed change optimizes a use case where items are moved directly to Next without making any other edits. Does that happen often enough to micro-optimize the interaction?
This one is a clear win, added as a feature request to do soon.
This was brought up before, so there’s a ticket for it. We’ll get there eventually.