Actually, he was good at the start of the season. He was about PPG then. It was until the suspension when he started slumping. That being said, his slump has been going on for too long and I am frustrated by that. But Carlyle needs to supplement proper linemates because what he has isn't going well and you can't put ALL the blame on Kadri. This line needs a defensive winger like Kulemin on it, to open up space.
Actually, last year he did hit the gym. He spent the summer with Gary Roberts, but leafs management didn't like that and wanted him to be with Anthony Belza (which he was this summer).
Honestly, for Kadri's career, I would be open to trading him because he will be a great player, probably not in Toronto. But I feel for him. But I would only package him for a #1 C. Nothing less.
I think people are at a logical-deficit when they suggest this. Think about it practically from the standpoint of another team: we give up a centre, who is likely the best on the team, for Nazem Kadri (and potentially something else) who is a centre we hope is someday as good as the one we're trading away.
Unless the team is rebuilding I don't see this as a logical option. I see Kadri being traded in a potential-for-potential sort of deal or for a d-man.