Better DnD visuals
The current DnD visuals are a bit meh, the thin border is hard to see and gets cut off on the rounded corners, which looks glitchy.
We don't have general guidelines for this, but the first thing I'd try is a semi-transparent blue overlay covering most of the view, with maybe 24px or 30px padding around the edges. Super quick mockup (blue 2, border radius 8px, 35% opacity):