He played in 2 regular season and 10 playoff games last year. That's not nearly enough to establish anything. Tatar scored 39 points in 73 games last year and showed he was an NHL player. Those are two entirely different situations.
So that takes away that he was our best dman last year in the playoffs? Go read what Babcock and Blash had to say about him. He is better then Evans and should have been playing over him. Plain and simple.