We've already committed to Kessel, and his deal is a bargain.
Look at how his numbers stack up against the rest of the league's stars, then revisit your post about how the Leafs shouldn't be committing to Kessel.
Kessel stacks up offensively at the top of the league. That was never the issue with him, it's the fact that he cannot and will not be a two way player that is leaf fans issue with him.
Of those top of the league players you listed they are significantly more valuable then kessel because they are complete players. Giroux, Malkin at least give you a defensive effort where Kessel (and the entire first line) sucks on that end.
The first line thinks if they watch the puck carrier enough by not engaging at all, that they will give it away. This is why I think Kadri is our best center, he engages the opposing center and it shows in his possesion stats.
This team will continue to be a run and gun non playoff team if your best player refuses to engage defensively because he's never been held accountable in his life as a hockey player. After a few years with kessel on the team, it's easy to see why Boston decided to give money elsewhere.