This tells me a couple of things.
Number one, JD, and JK aren't expecting a repeat of last season. I think they expect to make the play-offs, but I don't think they believe that the stars align like they did last season for 108 points.
Number two, Torts still has a lot to prove. In other words because of how everything went last season, and probably won't go this season, then let's see how Torts coaching goes in a more normal type of season.
And let's not forget the losing streak at the end of last season, and the early exit from the play-offs. If the team does big things this coming season, then I think Torts gets a better extension.