That's pretty much my list as well - Johnsson and (in particular) Dermott have already basically guaranteed spots on next year's roster, with Grundstrom and Aaltonen being guys that, I would imagine, will prove very difficult to send down once training camp opens up in the fall, and I expect them to make up 2/3 of our 4th line next year. I'm also in the camp that would like to see Sparks given a shot as backup next year, with McElhinney moved at the Draft.
I think a lot of it will depend on what kinds of moves our management staff decides to make during Free Agency - We're losing a few mainstays from our past few seasons' roster this summer, and it will be really interesting to see if Dubas and Co. decide to replace them with some of the other UFAs or if they, feeling confident in the development system they've put in place over the last 3-4 years, decide to simply promote from within and see what their kids are made of.
I wouldn't be surprised at all if Dubas moved on from Gardiner this off-season, believing Dermott to be ready for a larger role, and also could see Liljegren being a much harder decision for them than some might expect (though, were I a betting man, would probably count on him starting the year with the Marlies).
There's a lot of room for turnover this year, and it should be really exciting to see how we look moving forward.
*One little editing note regarding the article, though - Matthews missed 20 games this season, rather than 10.