A goalies rebound control is a factor in shots against and getting a goalie that might improve in that area, by catching more shots cleanly or directing shots away from dangerous areas or shooting lanes might be the very reason behind Nonis pursuing Bernier.
While our defense needs improvement, you can't ignore the high number of block shots that the present group does provide to assist the goalie and actually brings the shots against down in the process also. Its offset of course by the Leafs defense unable to move the puck out of the their own zone and give-aways that creating more opponent shots and scoring chances. The forwards are not without blame because its their defensive responsibilities to assist in clearing the zone.
Maybe your most down to earth and 100% correct post.
I will also like to add is that the defensive scheme that Carlyle had employed was designed to give up shots from the perimeter which was in fact the majority of the shots the goalies faced all season long thus the save% numbers the goalies have is kind of inflated IMO.
The D has been unfairly maligned this season. They did a great job protecting the goalies from facing shots from within the hash marks in the slot and did fairly well in front of them in clearing rebounds.
May I also add that the Leafs offensively there weakness to sustain the offensive cycle is what gives them a problem defensively. There line changes aren't crisp and clean in result of the fairly weak cycle game they get caught with tired legs that leads to getting hemmed in. It's then magnified even more cause the great Reimer has issues freezing pucks dead into his body X10 leaving glove hand rebounds that makes things even worst when the legs in front of him are burning on fire.
The 2nd period was the Leafs worst period this year do to the long change and constantly not being able to change the D cause of the weakness to sustain the cycle so the D can make clean line changes. We may all like to think the issue is the defense core but improving the Leafs offensive cycle game will have a huge impact on defense cause getting caught with tired legs on the ice would be cut down.