Not aware of the team interaction in 'the room',who is respected,who is listened to when it is needed most,who is best suited for any on -ice communication during a game with officials. My first inclination was Tavares, because of his experience and because of his work ethic. I am not sure he needed the added pressure as a Captain during his first year as a Leaf,so perhaps the timing was off. This year ,would be more suitable for Tavares to be Captain.
I was wondering if the added responsibility would catapult Matthews into a more serious player....as in ,not taking a shift off( apologies to those who disagree with my take,but I've seen it!) because he has the 'C' on the sweater.He has for the most part come as advertised and he seems to be a well spoken young man. The only other consideration,is that he might be gone in 4 or 5 years,so why bother. I would let him wait until after he re-ups as a Leaf so that Tavares can hand over the 'C' at that time.
If the team wants to avoid any potential ego conflicts,then the 'C' can go to Morgan,simply because he has been there long enough and has become a star player in the League and he is on the ice a lot!
Mitch isn't a consideration for me (favorite to watch) but his smarts warrant an 'A'.