He may have the far right crowd in hand, but the proposals he just brought up (term limits and ethics) certainly appeal to the centrist and undecided voters. At least those that somewhat keep up with politics. Many, if not most, of the informed people in this nation (and read that as a non-political blanket) know the majority of problems start in Congress (again, all parties are to blame) as well as the corruption by lobbyists. And will respond to such an idea favorably as even you did.
He has to get that centrist crowd on board in order to be competitive in battleground States. Lock up GA, AZ and OH after this debate; put PA, CO, FL, NC and maybe even NV, NH into play and you see a completely different race come election day.