Like I always preach:

8 team playoff is pretty sound -- but it takes away the amount of teams (12) being able to play in Big $ Bowls. You're reducing that by 50%.

The second big problem: Top G5 ain't getting an auto-bid for an 8-team playoff. At best, a somewhat lenient Chance for it -- compared to when there was 10 "BCS" bowls. Basically, said G5 Champ would have to be better than one of the P5 champs who got an auto-bid (or ranked in Top 10-12). On average, expect 1 out of 4-5 years a G5 getting in. That's a blow to the Elite Game situation. And yes, with an 8-team playoff, these are going to be the ONLY "Elite" games. Again, 50% less teams involved, in this 130-team football division. A lot of Resistance against it.

That's why I say just changing up the current 12-team BCS/NY bowl situation --> 12 team playoff where the Top 4 get a bye.

16-team conferences over time is doable. But remember, it's going to be done by their own volition. B12 lost a couple teams and isn't in a super-hurry to refill (although they will in due time).

But ALL conferences being 16? No. Basically, you'd be going from 130 FBS teams -> 157-160 teams (depends on if Ind teams join to some degree). I don't think there's a desire to import even More FCS teams into FBS. But in 2050? Yeah, I could see that. Assuming CFB flourishes well, and doesn't falter a bit due to injuries & people joining due to that stuff (as present time seems to indicate).