I personally think Leivo is good depth, and the team will need him next year when someone inevitably leaves the organization. At this point I don't think the Leafs should do much unless a very good deal comes along. They don't have any glaring weaknesses IMO, and really when the team has just gone 9-1, even beating teams like Tampa Bay, Columbus, and Nashville, should you really change anything?
I hear a lot of flak about Polak, Komarov, and Martin, and while a lot of that is perfectly justified, those guys still play an important role on the team and they are good depth and good pieces to have in the playoffs. Komarov is an elite penalty killer and I don't think he's as bad as everyone says he is. He is a prototypical fourth line player and I have no issue with him playing that role on this team. You've got to have a guy like Martin on the team despite how much the NHL has changed. And Polak, well, of those three guys I like him the least because he's too slow and I find him a defensive liability. So if they get rid of anyone I think it should be him, and perhaps make a deal for an upgrade on defense. But even with that being said, Polak isn't *that* bad, particularly if he's being used as a seventh defenseman.