Honestly, I wouldn't manage time that way.
Spend a ton of time preparing for a team that you might not even play at the expense of time that you could spend on the opponent on your schedule for January 1st? Some time - yeah - lots of time - I wouldn't - but I really don't know how much time is spent on future opponents during this period.
I agree. Saban said they probably would focus on fundamental for first few weeks, and then start game prep a week before the game. For a game against Clemson, I think there's more work on Clemson side since Alabama have new OC.