Marbury's shot was the only thing that wasn't working for him last year. He ran the offense well, played hard on D, and created no problems in the locker room. He can get into the paint consistently, and force the opposition's defense to collapse. When that happens Ray, Paul, Eddie, Sheed et al will have a field day shooting 3s. I thought the ball moved really well when Stephon was in the game last year. I'm all for bringing him back. Remember his reunion with KG remains unfulfilled at this point. They never played a minute together last year.
As far as his sanity goes, I doubt he's gotten any crazier over the summer. Danny has the 'Brain Doctor' in his corner to weed out the undesirable personalities. No way Danny would have signed him last year unless Dr. Niederangel (?) was on board with the move.