definitely not.
the leafs aren't going to win the cup in the next 3 years, perhaps not even make the playoffs. why trade a young #2C for a vet goalie that could potentially be a product of his team?
Fleury is going to get lit up if the leafs D doesn't improve this summer. that should be their number 1 priority. Kadri alone won't get the leafs a top 4D, but packaging some pick(s)/prospect(s) could get it done.
and if the leafs do end up signing Stamkos and want to accelerate the rebuild, then there are much cheaper options out there. goalie market has been shit for years, always more teams selling than there are buyers. add in the expansion draft threat for goaltending and it lowers the seller's asking price even more.
a team like CGY makes more sense for fleury. good team in front of him that could make the playoffs with him in net.
DAL has already stated they won't buy out lehtonen.
so perhaps Andersen to Toronto might be the goalie they get. PIT 1st (potentially last pick in the first) or TOR 2nd (1st pick in the 2nd) would be the max i'd give up, and that's only if the leafs sign Stamkos. otherwise they need to continue the slow rebuild, with acquiring D as their #1 priority this summer. There are a bunch of top 4 D potentially available too (barrie, shattenkirk, yandle, trouba, brodin, hamonic etc), but a lot of teams that are more desperate to win now will likely outbid them by overpaying. EDM, BOS etc