I'm really happy he's having such a fantastic year (Even though I'm a Hawks fan I'm from Toronto and the Leafs are the team I like most after the Hawks).
He's a really good player. People who point to last year as a way of denigrating him (not in this thread, but in general) are a bit offside. Last year the Hawks tried to turn him into our 2c (a gap for our team) and it didn't work out well...on top of that, he played injured at the end of the season and into the playoffs. All of that created the impression that he was a worse player than he actually was.
The other thing that some people forget to mention was the reality of the Hawks' cap situation - he's a UFA at the end of this year and the Hawks' are heavy on prospects/current players who could fill his role - so the Hawks dealt him when they could get the most for him. When he was traded from Chicago there were comments I read that made it sound like he just wasn't good enough for the Hawks, and that's not accurate at all.
I hope he continues to work out well for you and, if appropriate for the Leafs, he re-signs with you.