I think he is, personally.
He's not shaking and baking or anything, but that's not his game the same way Shea Weber never shaked or baked anyone.
Just the defensive and puck poise is unreal with his physical gifts. His panic threshold is incredible, he's able to twist and turn away from the forecheck and keep the offense pointing in the right direction always. In zone, he's always looking to create odd man advantages, jump into space, and get his shot off.
People like the Seider comparison and it may be unlikely that the offensive tools shake out that way and develop the way Seider's did.. but I think the defensive upside and ability on Reinbacher is actually more than Seider's.
Like I've said before, Reinbacher doesn't bring the sex appeal.. but I think people are underrating just how massively important an all situations right hand defenseman with size and skating, that always moves the play and offense forward for a team, is for a team.
I'm taking one of the top 5 if I had a choice, but if we are hell bent on not taking Michkov. Reinbacher is right there.