re: If 2 SEC teams make the playoff, would the committee try to avoid the rematch?

I think they seed it so you get the best ticket sales.

For example if FSU is #1 they will play in the Sugar vs #4. They're not going to put Oregon at #4 and make them travel across country to play and then send MS and Bama across the country to play in the Rose. The fan bases wouldnt travel as well.