If the Leafs are certain to sign Stamkos, they could draft Laine. Guy is Ovi 2.0. Otherwise, a franchise C is more important, and they don't have any.
Then again, they can draft Matthews, sign Stamkos and trade away Kadri - their C will be very strong then with Stamkos, Matthews and Bozak...
Anyway, as good as Laine is, I would still draft C.
Aho is already drafted by Hurricanes