If there is a separate G5 play off, the day that trigger gets pulled we are FCS. Call it whatever you'd like, but if there is a play off for the upper echelon and a separate one for G5, we and all G5 teams are no longer DI football. I don't care about budgets, fan bases, total scholarships, etc. when you have a play off to determine 65th place, you're the new JV.
Working with the system as it is now, I'd like an 8 team play off, as long as the G5 gets at least one spot. That will never happen as a G5 team winning would blow up their whole (almost) monopoly. The only scenario I see a G5 team getting a shot now or with 8 teams is if they run their schedule by all giant margins and they just happen to play a couple OOC P5 teams that are real good, maybe even conference winners and their only losses are to this G5 team. Then it'd be hard to ignore this G5 team.
The funny thing is that the P5 conferences are not all the best teams. They have many, even a majority of the best teams, but it's not like they are all the best and all the G5 teams fall under them. Purdue, Kentucky, Rutgers, Indiana, Vanderbilt and so many other P5 teams are never going to sniff a conference championship let alone a national title. Most of the P5 teams will not win a national championship in the next 100 years.
Where we should be going and maybe we will be going soon, is a separation of real college football teams and semi-pro or minor league football teams, sponsored by or wearing the colors of certain universities. 100,000 seat stadiums, multi-million dollar coaches and assistant coaches, billion dollar revenues and giant TV deals is not amateur sports. When a school pays a head coach more than another schools entire program's budget, let's call it what it is. Let the Texas, Alabama and Ohio State's of the world have their semi-pro league that feeds the NFL, not exclusively, but mostly. And let the rest of us enjoy college football. But they need to pay these players and I couldn't care less if they are students of the university or hired guns. I'm guessing there'd end up being 2 or 3 dozen teams in total.
Eventually these amateur players are going to be paid and when that happens, how does the Wyoming's of the world compete with Texas?
Program budget caps could also work, but that will never happen, as the playing field gets even real fast, and the big guys do not want a level playing field. Could you imagine Saban "only" making half a million?