It's really hard to tell for me what the Leafs will do with Matt Knies. Physically he is more than ready for the NHL. I think the pace of the game, especially playoffs might be a bit too much for him TBH. But if they give him sheltered minutes, and he can provide some depth scoring, you really never know.
I still remain pretty confident we will not see a Foligno like trade this year (ie. 1st+ for a rental). We need that 1st rounder badly IMO with the recent news of Rodion Amirov's health. I think we will be looking at that secondary market for guys like Gio, Schenn, or Middleton. Unless we land a big fish with more than 1 playoff run, I just cannot see us parting with that 1st personally.
Which might also make sense why we'd try "rushing" Knies. Give him and Abruzzese ELC's at their seasons end. Give them a look on the big stage, and see if they can hack out a role. It could end up being the equivalent to adding at the TDL, without getting rid of what little picks we have remaining.
I also think Matt Knies being in the AHL next year would be great for his development should he not make the Leafs. Of course, it would not be a big deal if he went back to school, but the kid is ready for the pro game. Onward and upward IMO.