I second Diaki’s comments …
More control in placing decorations. being able to move a piece and rotate on 3 axis instead of deleting it and replacing it cause it was slightly off center. I mean come on, 1 key to place an item but 4 keys change the size of the area when removing them?
When placing decorations, I would love to see an ‘undo last action’ button. Ideally it would work for both undoing a placement and a delete action.