otz will be here next year with whatever coach is hired becuause he is considered a good high major assistant and recruits the Midwest. I don't think there is any question that he will be here regardless.
As far as no precedent for an NBA coach going to college what does that matter? There a several coaches that go from college to NBA then back to college. If you can coach in the NBA you can coach in college. Now whether you can recruit is a different thing but you can have great assistants do that.
That is simply not a fact. Coaching in college and coaching in the NBA are two different animals. First, as you mention is recruiting. Second, in the NBA you are dealing with adults while in college you are dealing with kids. Not every NBA player is more mature than every college player, but on average, you are going to have more mature players to coach in the NBA than in college. In the NBA you don't have to make sure your players go to class, study and get good grades. In the NBA you are spending more time coaching in games and less time drilling your players in the basic skills they need to improve their basketball game.
Some coaches can succeed at both levels. There are a ton of examples of this.
Some coaches can succeed at the college level but not at the NBA level.
Some coaches can succeed at the NBA level, but not at the college level.
It is still a FACT that there are no college basketball coaches currently that have made the jump from the NBA to college without ANY prior college experience. It doesn't mean Hornacek can't succeed or that I wouldn't want him hired, but it has never happened.