Overall, nice job.
Dumoulin, Jensen, Brassard, and Foligno are excellent additions, but I hope they can sign Ryan Johnson.
Olofsson could easily be traded, the Sabres have too many left-handed prospects to not move him.
Actually it is unlikely Jokiharju is traded, he may get more ice time than Lyubushkin and would be on the team before Bryson.

Throw one of your scratched forwards in there for Rosen. He probably wont be ready next year, and even if he is you probably look at Savoie or Kulich first anyway.

Honestly id even move on from Mitts if you have those 2 bottom 6 centers anyway