I always felt the Rick Nash trade was the comparable, and this wasn't too far off in the end.
Pittsburgh got the best player in the deal, which stands to reason. He's going to be dynamite playing with Crosby or Malkin. Amazing player who management failed to provide the correct pieces to allow him to excel. You're not playing Phil Kessel for stellar defensive play, you're paying him to score, and that's what he does very well. Getting a bit of salary retained is good as well.
Biggs is a total bust. Erixon is depth. Pitt get their 2nd back. This stuff is a bit of a wash to be honest.
The Leafs get back a package of pieces to fuel the rebuild. A first in 2016, and a 3rd adds more picks for Hunter to use. There's a remote chance that the 1st is a lottery pick, but I wouldn't bank on it. At the end of the day anyone with sense knew it would be the typical star player trade in the modern era: a package of decent pieces. Kapanen intrigues me, but I don't know enough to really comment.
I'm satisfied. Not overjoyed, but satisfied. Good luck to Phil in Pittsburgh. He was thrown under the bus in Toronto far too often. People will eat their words next season.