Coco-puffs said:
That lineup above is really stacked with offensive d-men and probably requires someone who's strong defensively, mobile, can make the right play quickly, and is preferably a right shot.
I think Dermott is the new modern defensive defenseman. He checks all your boxes here except for handedness, plus he can chip in offense (it's a pretty heavy wrist/snap shot he fires very quickly). He is pretty crazy strong for his size (the Marlies dev staff had to get him to lean back down for mobility, according to Bourne), but lacks natural wingspan. He makes up for it in his skating and uncomfortably tight gap control, i.e. breaking up plays early before box out strength is required. Borgman is similar in specifications but is far more raw than Dermott in defensive instincts, and not as elusive on his skates (Borgman prefers to go through, rather than around).
I too see Liljegren staying in the AHL next season and getting the same development diet Dermott and Rielly received (matchup defense + PK1), a) to see if he has 1D capability, b) to sneakily show Babcock/DJ Smith that PK can be done with skill too, rather than just brute strength.