Big 12 and SEC Power Structures, Where Does Pac-12 Fit Into Playoff Picture?

After another wild week in the Big 12, what is the conference's power structure? Is Oklahoma still the best team? Is Oklahoma State carrying the Big 12's only playoff chance?
What's the SEC power structure? Is Georgia a better team than Florida (but with a tougher path)? And where on earth does the Pac-12 fit into a complicated playoff picture?