I expect DI and BCS conferences to be reasonably full, depending on the overall success of the game
I would predict that we will not see all human BCS conferences because a number of incentives now argue against that. We'll see what the long term equilibrium is, but I bet 7-9 humans in prestige conferences. Partly, this will happen because such schools have lots of fans who will want to get there.
Personally, I enjoyed coaching at my low DI school I actually attended and at elite schools that I like in real life or just in the game. I also enjoyed coaching at schools and in conferences that I just thought were cool.
So, hard to know. I bet we see good but not full BCS conferences.