The playoff system is an example where everything scales.
Prior to the BCS, you didn't have championship games. You just had bowls and polling picked the National Champions at the end of the season.
Then they introduced the BCS, which solved what most people wanted "We want to actually see the top two teams play". It introduced the issue, however, where we don't get to see the teams that missed the cut, through whatever reasons, even given the chance to compete.
So the CFP is introduced. It has all the same issues that the BCS had, but now we have 4 teams instead of 2.
So we introduce the 8 team playoff, and it doesn't solve any of the issues.
So we introduce a 16 team playoff, and it doesn't solve any of the issues.
So we intro...
In the end, what are we trying to accomplish?
Yes and playoff creep is something the NCAA was wary of between every step swearing the next step wouldn't come to pass.
As for the bolded,I like to use the example of the NFL or the NCAA in Basketball. The playoff gets big enough you are determining who won the playoff instead of who the best team is. I know it doesn't sound like there is a difference but there is. The two examples I point to (they are getting somewhat old now) are the last time the New York Giants won the super bowl they went 9-7 in the regular season, lost 4 games in a row at one point, 5 out of 6 in a stretch and 5 out of their last 8 regular season games yet won the Super Bowl. Now they WON the playoffs but were they really the best team that season?
My second example is in basketball, UCONN won it all in 2014 but only finished third in their own conference yet they won the big dance so does that mean they were truly the best team in the country that year? Or simply the hottest at the end of the season?
My point is at some point it becomes less about finding out who the best team is and more about crowning a survivor. Where that line is exactly, I don't know.
Edit: Thought of lots of other stuff....