Inbox has a “Move to position” option, and advanced settings has a “Move item to” setting which lets you configure whether you want items to be placed at the beginning or end of the list being moved to. It would be great to have the same option for “Drag under item”.
Originally dragged under items were placed at the top of the child list, but that has since changed to placing at the end of the list. Personally I much prefer having the items placed at the top of the list, one benefit being that it matches my preference for “Move item to”, and I can then use them interchangeably.
I understand not wanting to clutter the settings (hopefully partially addressed by putting it under “advanced settings”), but I think this would be useful and complement the other two settings that allow similar flexibility.