While I don't disagree that the Cowboys have probably decided to move on (not necessarily forward), I vehemently disagree on who is the better player, and that the defense didn't play a large role in the team's success, and probably about what is or is not 'leading.
The point is, that:
1. In order for Romo to be on the team in 2017, he will likely need to agree to a paycut.
2. If Romo agrees to that paycut, he's going to want at least the chance to compete for the job (Which IMO he would easily win).
So, IF he was on the team, I think it would be unlikely he is the backup, or costing 24+ million.