Calgary is stuck between a rock and a hard place with their current roster construction. No big name prospects, no top end talent, bad contracts, the whole 9 yards for a team destined to enter a massive rebuild. With this trade, they offload the Weeger deal and remove any potential mess that would come from an Andersson extension while getting back 3 futures with incredible upside and a first.

Skips over Buffalo for Toronto in 3 way deal (Sabres acquire Marner)

Whether you blame Marner alone or the coach or the entire team is irrelevant, the Leafs have folded yet again under the pressure of the playoffs. The biggest on ice factor for that result is (imo) the guy who couldn't generate any physicality, couldn't string a pass together despite being one of the best playmakers in the regular season, and is getting paid as much as two impact defensemen. This isn't calling Marner a terrible player, it's just pointing out that it's unacceptable to keep him around and extend him if you're the Leafs after that performance. Replacing a glorified penalty killer with two top 4 defense with some term (a lot of term in the case of Weeger) and opening up options to refresh the top 6 is vital.