Funny thing is, any level of football I have been involved with or watched has always struggled with the issue of unequal strength of schedules and the bitching that one school/team has faced a more difficult regular season schedule and another has benefitted from an easier schedule argument.
No league and level of sport does more to try to mitigate levels of competition be it through the draft process, hard salary cap, and weighted scheduling than the NFL and yet we still see the same arguments. Not to the same extreme as at the lower levels, but it is always going to be there so whatever system you employ stop trying to address this issue.
No one forced the SEC to load up on teams, they did it because of money and the perceived advantages and yet this time of year we hear the argument about how difficult it is playing in the SEC. Deal with it.
No guaranteed bids outside of conference winners simply because if you don't then why play the regular season.
I do like the FCS model of playing most of the games on campus to award the better teams and truthfully I think any number outside of 16 is too many rounds.
Whatever model is developed should only be implemented if there is no committee and there is no weekly fucking show that talks about the hypothetical rankings that really don't matter.