First Question: Yes, I would take that risk due to the high ceiling of him and the team. Though I don't believe I would be fired (more heavy and rightfully scrutizied) if it didn't work, due to my years with the team and team I built (me being Hahn). I understand why others wouldn't though.
Second Question: No, I haven't seen or not seen him change. Though I have no idea if he's been to rehab. I would hope the suspension last year and my assumed suspension this year with a stern warning he's done if another incident happens would help right his ship.