Subban is small and isnt sound defensively. You cannot be a top 4 NHL dman if you are a liability in your own zone. I dont value a pp specialist which is what he is basically projecting as of now to be our top prospect or even in our top 5.
These guys all have warts in their game. Boeser has issues with his skating, McCann is a toothpick, Virtanen can't think etc. Why would Subban's defensive issues be any harder to overcome?
Also, he has 55% of his points at even strength.
He is short, though, I'll give you that.