There is nothing wrong with Nolan, he's not a bad coach as he has proven several times, most recently with the Latvian National Team.
Seriously, it's like this every time some team becomes bad, replace the coach, no matter how good he is. Well, not even Scotty Bowman would turn this team into a winner, Nolan is not a bad coach.
My understanding is that Nolan has twice demonstrated the capacity to motivate a team to achieve above it's potential - old Sabres & Latvian's last Olympics. Has he proven the capacity to coach proven producers to achieve even mediocre results? That's an honest question, btw. I'm curious.
Anyway, while I realize that the majority view appears to be that the players are wholly responsible for this sludge, I contend that the fault can be easily spread around to include:
1) Some combination of ownership and management (depending how "going cheap" factored into decisions) where it goes to how it is the team has so many career plugs on the roster; and
2) Nolan et. al. who have managed to take what proven talent the team does have and deploy it in such a way that -
- all 6 (Moulson, Gionta, Hodgson, Stewart, Ennis, and Stafford) of the proven 20+ goal scorers are looking to have career breaking years, including 2 who should be in their prime (Moulson & Stafford) and 3 who are still young enough that they ought reasonably to have even more upside (Stewart & Ennis & Hodgson)
- none of the players who were reasonably expected to have some offensive breakouts have, notably Foligno (who in theory should be a lock/fit with Nolan's style) and Girgensons (who spends most of his game trying to carry the entire defensive side)
- the team's proven leadership appears generally ineffective where it goes to influencing work ethic and energy/mentality
- the youth that might reasonably be looked to for filling both offensive (ie: Grigorenko) and defensive (ie: Larsson) gaps still aren't on the roster while pluggers are deployed as second liners (ie: Mitchell, McCormick)
- the youth that has been around and also that might reasonably be looked to add some punch offensively (ie: Reinhart) and defensively (ie: Zads) are deployed only sparingly in situations where they would have a chance to contribute at their best
Seems to me really easy to pick out any one player and either rationalize his floundering or shrug him off as a bust, but when most are floundering and none are thriving it's kinda hard to say none of it goes to the coach - the common denominator.