I watched him twice in this tournament so far, and both times, he looked bad. It's not *that* he's not making saves - it's *why* he's not making saves (poor defensive play by his teammates notwithstanding).
The technical problems with his game that jump off the screen to me are: 1) he drops his a$$ too low, which opens up his five hole, hampers his rebound control, and prevents him from moving laterally as effectively as he could. See, e.g., GWG last night against the USA. Dropped his butt, couldn't close his five hole. For a guy who is 6'6", he folds himself into a pretzel prior to the shot, and he can't "unfold" himself to make the save. Or, if he makes the save, his body is too tense to effectively control rebounds (when rebound control is possible - sometimes, it's not); 2) He's constantly flat footed and looks like he has no idea how to move with the play when a player is skating in on him with speed (notice this problem with Lehner, too); 3) his blocker-side elbow is literally a gaping hole. Every time he butterflies, he's trying to snap his elbow shut, which prevents him from using his blocker hand to actually make a save.
All of these things are fixable, but he needs a goalie coach at some point who sees these things and knows how to help him fix them. The kid looks kind of lost right now, and a coach who can help him understand what's going on, and what he needs to do to be successful *and be able to repeat the things that make him successful* is important in development right now as he moves up to higher levels of hockey.
Tangentially related to the above, I am skeptical when organizations say, "we'll develop him." Okay - so, how exactly are the Sabres going to develop this kid? Because if he doesn't get proper coaching to fix some or all of these things, he's not going to "develop" into a better goalie. So, I view this as kind of a test to see where the Sabres organization is with goalie "development."