There's some reasonable excuse for not moving him... NMC, keeping Pavelski around, cap limitations due to other NMCs...
I think he was alright during the regular season but Nill really needed some extra youth in the backend that he could rely on down the stretch. Unfortunately, Lundqvist didn't take enough of a step and Hakanpaa was injured. Had to make a choice this year, and he chose a 'top of the regular season' because business > playoffs.
I agree. Add in the uncertainty about Nils, and our shortage of draft picks. Basically, even though he was a warm body, we would have to give up other assets to get another warm body for the third pair, and at least his weaknesses were known to the team and factored into their chemistry, which is never a given, even if Tanev fit right in.
But to think, we used to rake Nill over the coals for his insistence on keeping 8 D on the roster. Well, Suter being old and Nils being ineffective would have made 8 D a luxury. Nill skimped and it hurt.
All that said, I wonder if not resting Pavs and Suter more often during the season was the biggest blunder as they both crapped out in the playoffs pretty much.