while everyone has good points. One thing I'd like to add is that the system that Fleury plays behind is one that will kill stats. The penguins system is setup such that the # of shots might be lower, but Fleury will see a much higher number of grade A scoring chances against then most goalies.
A defensive hockey team is one where the types of shots the goalie sees are mostly lower % shots. Not back door 1-timers, or guys all alone 6 feet from the goalie. I don't care who you put in net, the way we played as a team last playoff series the result would be the same. That first goal in OT where our Norris level defensemen tips the puck away from the goalie, over by our Selke candidate Center who just watches the other team's player tap it in the open net.
we are not a very good defensive team we have talent, but have some serious lapses. (insert argument of whether it's personal or system)
When Mario was in his prime, we played in the other end so much that was our defense, a good offense. who was getting the puck away from him when he didn't want them too?
That said, Fleury was horrible last playoff series. Before Fleury's wobble at the end of the season (which I think was because of a combo of him playing too much due to Jonnie falling apart and Crosby's return mucked the chemistry up) he was having a pretty good season going.
I think a new Goalie coach has to come in. Fleury is in prime years now, compared to his peers in the NHL today his talent level is right at the top, he just needs to get his head screwed back on straight.