I understand why he did what he did, but I believe he has contributed to the fiasco that has taken place and blame him for harming Penn State, Joe Paterno, Graham Spanier, Tim Curley, Gary Schultz, and his father.
When he flipped, IMO it caused a dysfunctional defense team to go off the deep end. For fear of MS being called as a rebuttal witness, the defense decided to go back on their promise for JS to testify in his own defense. This amounted to essentially throwing in the towel. In hindsight, it seems that had MS testified he would have had some credibility issues raised during cross examination. Also, I am sure that JS now regrets not testifying in his own defense independent of whether or not his son testified.