It would be nice if we could "lock" positions on the bar so they stay free unless something is put there manually.
Or we define on a character basis what can get auto-added to what section of which hotbar. You could define that the first part of hotbar 1 is locked, the second half is reserved for spells, while arrows go on hotbar 2 and poitons etc on hotbar 3.
Should be easy to do? The hotbars probably are internally some sort of array or list?