This thread is annoying because of the constituents.
Greene is our best defenseman. Above-average ceiling, and consistently hits it. Rare crap games.
At times, Zidlicky is our best defenseman,(certainly most explosive, risk/reward) because he will have a monster offensive game without meltdowns. Highest ceiling, hits it 60% of the time, occasional penalty/meltdown riddled garbage fests, but is usually pretty solid at both ends.
Gelinas has the 2nd highest ceiling, because he can change the game with one shot, and also shows good offensive sensibilities - enough to be a significant contributor on the offensive side of the puck. I think his defensive zone play is slightly underrated because of some late season games where he was dinged and tired. Defensively, he plays below average #6 dman, but is reasonably consistent at that spot. You need him in games because really could have a huge impact.
Merrill and Larsson both have the 3rd highest offensive ceiling and probably the 2nd highest defensive ceiling after Greene. Merrill played near his potential defensively and added some offensive punch. Larsson we didn't see enough of, but he was consistently good defensively and was decent with breakout passes..
Sal is a borderline #5 defensive Dman at this stage. He was terrible for much of last year, looking significantly worse than Volch most of the time - I guess his locker room intangibles and leadership have to be it until someone takes his spot. He's important to have back there though - to protect the kids, take some of the rough stuff, and be our one physical defenseman.
I can't imagine Komisarek, KHLdude nor Kaberle get a look. I don't think Severson is solid enough to make the leap. Interesting if Helgeson has a good camp. Real interesting if someone like Scarlett or Burlon come out of nowhere and surprise, but I'm thinking those guys might end up career AHLers at this point...