I believe it would certainly be possible to have the best of both worlds. Meaning that new items are placed in the quickbar but dont overwrite already assigned slots.

I just tried the new Tutorial and hope the new Biter balance is not like that in the main game... I'm kind of a noob at building efficient defenses, so the first really big wave killed my base after 2 and a half hours gameplay or so.

Thats really unintuitive in my opinion... I had to look up in the forum how to reassign a quickbar slot because it does not overwrite. So was it intended to have this behaviour? It should be overwritable by placing another item on the same spot. Edit: I just realised how bad that would be, cause it ...