No reason that OZ should not be playing Manning style. In fact it might help to speed up the learning curve.
A few questions 24 games plus post season. That would mean starting the season mid July.
You would have to insist on teams either play on turf. Or the stadium has to have new sod over a heated field in most stadiums.
Vegas probably would fight this tooth and nail. As not having a clue on which QB is starting for which games. Would be impossible to set the spread.
Lots of things to iron out.