I'd like to suggest an option when trailing in the fourth quarter for the coach to start calling the higher avg yards per call plays from that game and vice versa the defense gets to call the lowest.

Maybe it's a rule option.. I dunno. Not a rules guy to know .. lol

Isn't that already in misc, the adaptive thing? though that could lead to play overcall.

Indeed! but it doesn't allow you to choose what plays.. you need to set rules for that.