I would think Bowey is gone. Lindstrom, Seider, and I would wager that Cholowski are virtual locks to move up. You plan on having Dekeyser, Hronek, and Nemeth back. Alex Biega is still under contract. I would run with that group of 7 into next year assuming no trades and that McIsaac doesn't uproot someone immediately (otherwise he will be in GR on the top pairing hopefully).
As for the forwards you have listed, I would honestly only resign Timashov. Ehn doesn't need to be here. Neither does Erne. Obviously sign Mantha, Bertuzzi, Fabbri, Timashov. If you want to give Svechnikov, Hirose, or Turgeon a short term bridge, then I would buy that.