My big beef is that the gate screens (forget the app) don't seem to accurately list the real view of confirmed or standby pax awaiting seats, either in aggregate or on the standby list. Nothing more frustrating than being #1 for standby and watching cleared names start to appear above me from out of nowhere until the flight is full. I think it would go a long way to manage expectations if DL could display all pax awaiting a seat, regardless of whether standby, confirmed, paid, nonrev, etc. in their proper order.