Greenway will play, he is in next years plan and he will play as soon as he can. That puts someone on the bench right now. Most likely that is Vinnie, but maybe not. VO and JJP have not outplayed him since he has been back from Rochester. A rotation is not out of the question. Again, no one needs to go to Rochester.
When Tuch comes back someone else sits and at that point we have 2 spare forwards. You can guess that 2 of the 3 - Vinnie, VO, and JJP - will sit when Tuch gets back (assuming he does).
Granato will most likely base the decision on many factors such as the opponent, how they are playing, and if anyone else is dinged up and needs a rest.