He's a good coach, he is very pragmatic. He knows how to work with what he has, and will change accordingly. And is obviously very willing to work with young players and work well with then. He trusts them and lets them make mistakes and coaches them well.
Before Leipzig he was with Ingolstadt, and did a really good job with a small team with a small budget, but the football wasnt' anywhere near as good as with Leipzig - which is why I say he is pragmatic. Not the sort of coach who would try and coach excting football if he doesnt have the tools at his disposal.
But I don't think he has ever made noises about moving from Leipzig at this time.