I know this is fake news, but in the short term all the UK players in the league would probably want to go to NY to be under him. It'd be a nice selling point to potential FAs in the coming years. Build a rep off of that and he'd be golden.
All that said he's king of the castle at UK and shouldn't ever leave.
Ehh, I'm sure it would be a selling point a little, but by the time his guys hit free agency I doubt playing for a coach that they spent one year with way back in college is a top priority.
But yes, he shouldn't leave, and also the last thing the Knicks need now is another big name with no front office experience.