I can not understand for the life of me why Leaf fans are so high on Colborne. He is not that good in my opinion. I find it troublesome he is 23 already and can't crack a spot on the Leafs lineup. He is behind Grabovski, Bozak, McClement, Steckel and Aucoin. Seriously, he can't beat out one of those guys? And I believe Kadri is a natural center. Colborne is a 50/50 making it in the NHL guy.
McClement and Steckel are 3rd/4th line PK guys. Grabo is technically the first line C right now but plays on the second. You also have Bozak, Lombardi and glass man Connolly all with significant NHL contracts which basically leave them pencilled in to the NHL till the end of their deals. You also have Kadri who is still in front of Colborne. Its just too jammed pack with NHL contracts for him to be playing on the leafs and quite frankly I would rather him play more in the minors for the better ice time. He's currently 22 and has only 2 years of pro hockey played. He's just coming off a season ending injury last season. This is honestly a typical time period for guys in the NHL. I really don't know what your expecting although I do find it funny for years people were bitching and moaning that the leafs used to play their young players too early and they always suffered. Now they pretty much follow the Detroit model of grooming players and people are bitching because he can't make a lineup packed with centers.