His system was the best option for a team that was vastly undertalented due to frugality.
With very average talent he installed the left wing lock with awesome, tough left side defensemen for it in Methot, Phaneuf and Boro, and nearly took out 3 teams in a row in the playoffs despite being underfunded by millions.
Once Methot was gone the next year and replaced by the comedic insertion of Johnny Oduya, and Phaneuf lost another step, his system was dead and the horrid, cheap roster was exposed.
He was stubborn, but nobody was going to succeed with D+ talent. That said, his failure in game 7 OT vs Pitt to set players free to try to score, either when Crosby and Malkin were off the ice, or maybe putting out his best 5 on occasion, was painful to watch. I think they had 2 shots in the first OT.
Noteworthy is that the 3 deadline forward acquisitions that playoff year Stalberg, Burrows and Wingels had 0 goals, 7 points in 41 playoff games, and a -8. Cheapo's cheapies, instead of getting some real acquisitions, may have been the difference in a Cup final appearance