There's a saying that goes something like "A man's character can be measured by the way he responds to adversity". I look at Joe Mixon, who still has a long way to go to regain a lot of people's trust, but he could very easily have gone back to California and ended up at another school this year. Instead, he stayed, faced the music and appears to have followed the rules put in place for him. Obviously Keith's issue is much different, but if he ends up getting help for whatever it is that's affecting him, and works his way back onto the team, that'll say a lot about his character.