As far as I am concerned there is no one player that should be above a franchise, because it takes more than one player to make a franchise. If the Celtics NEED a commitment from Kyrie NOW and he is not willing to give it, you have to trade him. If the Celtics do not NEED the commitment yet, then you wait. 
It really is that simple.
All Kyrie had to do was say, I told you I am committed to the Celtics long term, now I have to concentrate on winning a championship. That is it, but because he is all about drama he just cannot. Now the entire team is affected by this 'leader'.