I'm not sure if it's ever been clarified about the playoffs sim schedule. I'll update the Rules page today since it is slightly dated. Here's what we'll do for playoff sims...
Wildcard Series and League Championship Series
Sim schedule of 3-3-1
Home Field format of 2-2-1-1-1
Federation Cup Series
Sim schedule of 3-3-2-1
Home Field format of 2-2-2-2-1
Potential of Live Sims if one or both teams can make it work