Which parts of his game aren't correctable? Just wanna dive in a little deeper here.
So a few things. I'm not sure if it is a fitness/strength issue or not, but he is not the fleetest of foot and he gets way out of position if he needs to react laterally. He seems clumsy/klutzy when he is forced to move and lets inertia carry himself way out of position. He gets floppy and seems to struggle to control those big legs and pads.
Tracking also seems to be an issue for him. He sometimes has absolutely no idea where the puck went when play goes behind the net and then back out into scoring areas - reacts way too slow and can't read the play. Depends on his positioning to cover those lapses.
Lastly, he seem to under-react and make slow decisions when the puck is in his crease and can hesitate covering it up when there is pressure either becuase he is flopping around, or just because he's holding his position.
He stays in that STUPID RVH position way too long at times. Again, this seems to be him leaning on his technique over instinct.
All of the above are 'sometimes', but when he's on, he definitely can make that OMG save, like he was doing with his glove the other night. I think it may be a Jedi thing where he needs to let go of his technique at times and trust his instincts. "Linus... use the force..."