I mostly dont care about production. I know about his numbers, but mostly react on it as "good to have", nothing more. The biggest thing I learned from scouting is production means not so much. Teams can be weak or strong, league can be tough, players can play different roles. My most favorite players from the draft like Sanderson, Slafkovsky, Raymond, Simashev, Edvinsson were not productive.
So Im trying to see how player play his role, what he is doing, what he is trying to do, how many different things he is trying to do, how he reads the zones, how active he is without the puck etc.I know what are you talking about, Buium is trying to a lot and I think he has a lot of time to figure it out. It still a series level for his age and I think its still better to do A LOT of stuff and miss on 50% on it than do mostly nothing.
So overall I agree with everything you said, but Im watching on it in more positive way. Most of all because he still is a good defender in his own zone. And I saw a lot of things where he changed his position or body to act before next phase of the situation will start. I see many moments when he screened situation around him before the moment to join the rush/board battle/move on the blu line/etc and change the next step. I think sometimes he is trying to do more than he can and more than his partners can understand, but still I like he is trying and learning. And even if he will never reach his 1st pair true dynamic driving potential, he should develop into the solid 2nd pair two way defenseman like Nate Schmidt, may be more offensive oriented. And I think its a solid outcome.
I cant close my eyes on his vision, how he is trying to work with his partners and in the same time how he is trying to do by his own, he takes responsibility, drives the net, and work hard on the boards, he is active and trying to push away opponents who is trying to drive the net. He is proactive, not just responsive.
Silayev has no as good vision, Levshunov is the real defenseman who is trying to do by his own, his defensive mistakes and bad decisions are more dangerous, Parekh and Yakemchuk arent good in defensive zone, Yakemchuk isnt even very good transitioning defenseman, Parekh cant play physical game. Of course Silayev is so big and so mobile for his size so I can understand why someone will rank him higher than Buium. And I like it - I want Buium) and Dickinson. But Dickinson should be taken as a first LD on this draft in my view.