I liked Granato a lot as a person and enjoyed listening to him on WGR when I could. I certainly can't judge him on Xs and Os, but just as important, if not more so IMHO, is motivating players. They are pros and supposed to be motivated, but that belies human nature. They rarely looked motivated in the first period (it seems they'd only come to life when they were down or waited until the last period). In fact, the past 2 years, it also looked like the team would wait until the second half (or later) of the season to start playing in a manner showing they wanted to make the playoffs. To me, that is all on the coaching staff.
These players obviously need external motivation. You don't necessarily need some guy who is going to crack the whip, as there are different ways to motivate people. But it seemed pretty clear that Granato either didn't think it was necessary or relied on a method that wasn't connecting.