My take on EJ Emery. If I were to compare him to past USNTDP defenders, he is a mix of Alex Vlasic and K'andre Miller with less offense than either of them. The lengthiness of Vlasic and the skating of Miller.
He is a big lengthy physical defender that covers a ton of ice. He plays ABC hockey and really good at man on man coverage. He is really good at rub-outs along the boards and getting his stick in passing lanes. His path to success is to get better at his breakout passes and enforce a defensive defenseman style of play. He creates a lot of turnovers because forwards won't realize how much ground Emery takes up. He can keep pace with just about anyone because of his skating ability. He walks the blue line very well and just an all around great skater for his size. He makes life easy on his defensive partner because he is good at getting open for regroup passes that ease the pressure off the puck holder. I can see teams salvating at the idea of getting a defender like this that can takeaway space from creative forwards. He's quite good at creating space with his skating, but lacks the creativity to be dangerous with it. His impressive build is even more impressive when you realize he is not filled out at all. He is really good at using his weight distribution to win battles along the boards. I bet there are some teams that are really high on him because they see a lot of room to grow with already spectacular mechanics to win puck battles.
The concerns with Emery is he dishes out passes that set his teammates up for failure. He's good at finding the open man, but doesn't think a step ahead of that. If he see's a guy that's open at the time, he will make a pass towards them without considering the defenders anticipating the play. This leads to a lot of turnovers and suicide passes after the pass is dished out. In the offensive zone, he has limited ability. His shot is fairly weak and his offensive hockey IQ is below average. This really limits his offensive ceiling as a defends and would be the reason he isn't drafted in the 1st round if so. The last concern I have with Emery is his projection of where the opposition is moving towards. Similar to his passing issues, his anticipation can be off. When he uses his speed and lengthiness to cut forwards off, sometimes the speedy forwards will beat him wide and take him out of position. This is the only concern I have for him in the defensive end. Outside of that he is a really solid defender.