Some of Lohrei's problem is that he's so tall and so thin. Speed guys shorter, which is 6'0 get under him and out leverage him physically.
The othe big one is the quick jum in level, barely time in the AHL, he brain hasn'slowed the game down.
We've seen what he can do with the puck on his stick in motion. A lot of his defensive mistakes have been caused by, my 1st point, not strong enough or doesn't know how to use his body effectively. 2 - he's mistake prone while not in motion - first reads after puck recoveries while static.
Are these fixable, maybe, he doesn't seem like a body type that will get much bigger at his age, especially without losing speed and agility.
He may wind up only being a PP specialist in the NHL.