No real doubt? The Hawks were 13–17 against the West playing the minimum number of interconference games. If they’d played 52 games in the West instead of 30, they could very well be fighting with the Trail Blazers for that 8 seed.
More importantly, Millsap didn’t lose Durant for nothing. Making the playoffs in the West after the best player on the team and top-3 player in the league up and leaves is one hell of a feat. (And before you say it — yes, I know what happened to Horford and Teague. Still not the same.)