I bet JC and KO had some discussions on this. JC has been around the block a few times at least. I'm sure he knew Ollie's potential and what any level of success at Uconn would do to his marketability. Last think JC wants is to have HIS guy bolt before the transition is complete and to see the program he build fall apart. I'm not suggesting that KO is staying for 20+ years, but I do think JC and Ollie have an understanding about commitment to the program and a certain timeframe in mind before Ollie leaves for greener pastures at the next level.
Any level of success that Ollie has at Uconn is going to get his name mentioned for other jobs. Even JC flirted with South Carolina and the Lakers during his tenure.