You know this is an interesting take and one I toyed around with myself.
I almost felt like adding a fourth category for a guy who won't be bad per se, but might struggle to match the expectations. ADA and Trouba were too guys who I'd consider for that spot. Kreider is another.
With ADA I worry the cart gets so far ahead of the horse, that we overlook that he's still a work in progress. With Trouba I wonder how he does away from a team like Winnipeg and in a role where he is unquestionably "the man" on defense. With Kreider, it's more of a gut thing that isn't based on any one or two things in particular. It's just a weird uneasy feeling.