Well, we were a playoff team. That's one. We only lost Streit, who most looked at as a complete liability defensively anyway. There were a lot of expectations riding on Donovan, and I don't think they were out of place. He was a very solid prospect. Maybe not a blue-chipper, but a guy who IMO could have been expected to give us at least what Streit gave us defensively. I think most thought the offense would take a hit from Donovan replacing Streit, but his defense has been a surprise to everyone.
Either way, the beauty of having all of these quality D-prospects is that you don't have to go with Donovan if he doesn't look up to the task, and when Reinhart outplayed him(and many others) in TC, it looked to me like he would be Streit's replacement. Unfortunately the Isles were looking too closely at the offense we were losing, and assumed Donovan would be the better fit for that spot. It's come back to bite us.
Aside from that, I do agree that it was never a guarantee for this team to make the playoffs. Regardless of how our young players developed this year(or didn't develop), I think everyone knew that if Nabby regressed we would be in trouble. Unfortunately not only has he regressed, but we lost our 2nd best defenseman, our 4th or 5th best defenseman, and our 2nd best offensive player. We were pretty thin to begin with, but this has all but crippled us.
I'd honestly like to see where we would be right now with a healthy Vis, and healthy Vanek, and Reinhart instead of Donovan. Even with Nabokov's struggles, IMO Poulin has played well enough to win in front of a solid defense.