CFP hopes vs. BCSCG hopes

I was just wondering to myself, How many schools have reasonable playoff hopes? and then How many schools would have had reasonable BCSCG hopes under last year's system?

Without getting too neurotic about it, here's the simple criteria I'll go with here, knowing that it isn't 100% accurate--this is just for perspective:

CFP hopes: Any Big Fiver with two or fewer losses, and any other undefeated school.
BCSCG hopes: Any Big Sixer with one or no losses

(Obviously these criteria aren't solid--there are rare historic anomalies within all three)

As of today's standings:

Schools with any reason at all to hope for a playoff berth: 39
Schools with a shot at a hypothetical BCSCG berth: 20

This, I believe, makes for a more meaningful regular season.

If there were a 16-team playoff, I'd guess that any Big Fiver with three or fewer losses, and anyone else with one or zero losses, would have a reasonable shot. That's 55 schools. Seems fine, but it allows for the possibility for a team to tank a game toward the end of the season just because they can.

I think anywhere between four and eight is just fine. It's enough for a legitimate field to be drafted, and it's not so many that the regular season takes a hit.