There are some teams that meet that > 50% blue-chippers requirement that I don't think are good enough to win it all.
First of all, I don't think Oklahoma will be good enough at the start of the season to get through with no more than one loss. We don't have a QB with significant experience, and we haven't had the competition that we would have had in the spring to see if one is clearly better than the other. CFB these days is a very QB-oriented game, and Lincoln Riley's offense has reflected that.
I don't Texas is good enough to win it all. The Horns haven't won so much as a conference title since 2009, and only three in the last 24 years. So it's hard for me to see them jumping all the way up from that to winning the NGC. I readily admit that Tom Herman gets 'em ready to play very well in the RRS every year, but he also doesn't have his team nearly so well-prepared to play lesser opponents.
I don't think LSU is good enough to win it all. Winning back-to-back is very hard and LSU has lost a lot from last year's great bunch. QB and QB coach are the most important losses.
I don't think that Florida is good enough to win it all. I don't think they'll beat out Georgia for the SEC-E title.
Likewise, I don't think that Michigan will be good enough to beat out The OSU for the B1G-E title.
I don't think that Notre Dame is good enough to win it all.
I don't think that Washington, with a new HFC, will be good enough to win it all.
I don't think that USC, with a coach on the hot seat, will be good enough to win it all.
I don't think Texas A&M will be good enough to win it all. They might beat Bama and then lose to both Ole Miss and Mississippi State.
My picks for the CFP: Bama, Georgia, The OSU, Clemson.