The Leafs "gave up a lot of shots from 30 feet out" because teams TOOK shots from 30 feet out WAY more against Toronto because THEY HAD THE GOALIE WITH THE WORST REBOUND CONTROL IN THE LEAGUE IN THE NET. It wasn't that other teams did a better job of "taking away" those far-out chances, its that teams didn't attempt them at nearly the volume they did against the Leafs, for obvious reasons.
Against an NHL goaltender, a 30 foot shot is pretty undesireable as a scoring chance because its very rarely going to go in and even more rarely will it result in anything other then the goalie either freezing the puck then playing it to a teammate or steering the rebound into the corner or open ice, essentially turning the "scoring chance" into a change of possession. But with Reimer, he mysteriously couldn't catch the puck or he somehow managed to create rebounds and dangerous ones on an alarming amount of those low percentage chances. That, right there, is why the Leafs GM felt it neccessary to make this move.
The Reimer fan boys can scratch their heads and be perplexed about this deal, and they can continue to pretend that the Leafs didn't have any goaltending issues, but what I just explained is exactly why they were kicking the tires on Miikka Kiprussoff, its exactly how they blew Game 7 against Boston (in a game where Riemer otherwise played great) and it's exactly why Bernier is now a Leaf.