Division winners advance. Next two best records in each "conference" (A/B and C/D) also advance. Seeding is based on total points (3 for a win, 1 for a draw).
Tiebreakers will be head to head record. If still tied, then coinflip (if it's just for seeding) or best of 3 playoff.
Top 8 will be contested under AFL finals system style because it looks fun to me. Best of 5 games for all rounds.
It's no different than (for example) last year's MLB season, where the Cardinals made the playoffs and the Red Sox didn't even though both of them had 90-72 records.