I think SA is the only club in NBA where Messina can potentially succeed as an NBA head coach. He is definitely a great coach, tactician and teacher and if you want a coach to lead a superstar team in Europe, he is IMHO the best guy in the world for the job. He could be a truly great coach for big name NCAA teams like Duke, NC, Kentucky etc. In many ways he is a rich man Calipari, only even more dictatorish. He's won almost everywhere but one thing is to coach and win with CSKA Moscow, European juggernaut with unlimited recourses and superstar players (by Euro standards) where you are a God-like figure and another thing is to coach a small market NBA team with issues or actually any other NBA team. NBA players will not appreciate his managing style. Can he adjust as a head coach in NBA? Can he still be a great one without his edginess? May be. I just doubt.
IMHO Blatt was a poor man Messina in Europe but he is better suited for NBA. I would definitely take Blatt over Messina. Blatt was also tough on players, was a control freak BUT players still loved him, played hard for him. He was like their strict and demanding father or older brother unlike Messina, who was players hard-a** boss.
I think Blatt can build strong no nonsense relationship with DMC. Plus, Blatt showed that he can be successful in different environments - he coached big clubs like Maccabi, he was successful with some no-name clubs in Russia, he even won some kind of Euro cup with one of them, he has almost a legendary resume as a NT coach with Team Russia. He also has NBA head coaching experience and it was not an easy one, so I think he is ready to take on a team like Sacramento.