I think the 4 pod concept is by far the best configuration, but I would make the groups so that ISU is with Cinn & WV and so that UCF is with UH & Baylor (this improves the consistency of playing Texas teams).

Your idea for the 9th game is brilliant in that it 1) basically makes sure both teams in the conference championship are ranked, 2) makes it very likely the champ has two wins in a row against ranked teams (will help with seeding), and 3) increases fan interest in conference standings (you pay attention to who you will play in the 9th game).