I'll repeat such a statement for the 1000th time: going into next season with a d-core composed of Rielly (not that good at D), Muzzin (insane at it), Holl (ideally a number 5), Dermott(good, but not a guy who'd I trust to play over 20 minutes every night), Lehtonen (guy who never played in the NHl) and sophomore is EXTREMELY risky. If the Leafs wan to achieve regular season regularity, they'll need to either make their goalies transform into brick walls 2 nights per week or improve that d-core. Or play 7d-men to spread out the ice time between 7 guys

Player movement might be quite difficult in the off season. The purpose of this post was to show where the Leafs stand going into next year.
We have several tradable players. Yes we need a t least one decent defenceman.
By the way you are probably selling low on Holl...I think he is a legit top four. I mean he is playing top four minutes as a shut down pair and doing really well.

I would say the Leafs have achieved regular season regularity, and if they're finding 10 - 20 games in their D is getting killed then they can address that via trade