Wake up phone with scheduled texting, calendar, and/or alarm integration.
My phone (A Samsung S7 Edge on T-Mobile) doesn't send the scheduled texts if it isn't 'awake' for some reason. If I haven't unlocked/opened the screen within the previous hour or so. I'm still trying to trouble shoot the exact conditions.
Integrating the scheduled texts with the calendar, and setting an alarm with silent tone just before time would accomplish several things people have requested.
It would provide a single place to view all upcoming scheduled texts, it would provide a popup notification just prior to the text in-case someone wants to cancel it, and it would wake up the phone before it was supposed to send.