OKC without Durant missed the playoffs two seasons ago, I think they'll be battling till the end for the 8th seed.
They won 45 games that season. Most years that would put a team comfortably in the playoffs. Westbrook also missed 15 games that year. And their team that season beyond Durant and Westbrook was not anywhere as good as the team they have now. I expect them to make the playoffs easily and still be a threat in the division.