[curt.clifton]

Ian,

Have you tried filtering for Due Soon actions without grouping? In Preferences, you can dial the Due Soon time frame down to 24 hours. With that setting, I think the Due Soon filter would show what you want.

[Update: just realized the Due Soon filter shows all Due Soon actions, not just the available ones. So depending on how much you use sequential projects, this may not be what you want.]

(Also, consider using Use Help --> Send Feedback to submit a request for "smart groups" that can filter on arbitrary criteria like "Due Date before tomorrow".)