I read Brossoit is a friend of Helle's & recently started working out with him @ Francilla's camp. It's biomechanics & energy control that affects motions used.
Hopefully it turns him around.
Those are probably two of Brossoit's only strengths, so I'm not sure I'd expect a turnaround.
He's very much a blocking type goalie, so he's usually in position and pretty quiet in his movement. The problem is he seems to struggle mightily at tracking the puck, so he gives up a bunch of rebounds and goals up high while already playing a style that's weak in those areas.
His main weakness that's going to keep him out of the league, IMO, is between his ears though. If he let's in a goal(good, bad, doesn't matter), you might as well pull him. He's going to get rattled and let in a couple of weak ones before finally settling in and playing a pretty solid end to the game.