re: Ohio State will finish the regular season undefeated.

Unless PSU gets lucky, I expect OSU will beat PSU convincingly. I'm not 100% sold that OSU will get out of the big house with a win. Likely OSU beats Michigan? Yes, it's likely but I don't believe it's a given. Michigan is playing pretty good football and will be OSU's biggest challenge. If OSU gets past Mich, they'll beat Minnesota.

At this point in the season, I actually think Clemson is playing better football than OSU. So, I do think LSU staying #1 in the rankings gives us an advantage.
I disagree with the pundits that believe OSU will jump LSU. It wouldn't make sense to put OSU #1 for two weeks just to put LSU back at #1 if LSU wins the SECCG. It would be absurd to rank OSU above LSU if both teams win out.

As an LSU fan, the only team LSU really need to be focused on is UGA. LSU beating UGA is anything but a given. UGA is playing good football. If LSU wins a NC, it's bittersweet if we lose the SECCG. Moreover, I'm one of those that truly believe if a team doesn't win it's conference that team should be playing for a NC, but that's just me and my opinion.

As an SEC fan, I'd love to see two SEC teams in the CFP, but the only way that happens is for LSU to lose to UGA. Bama is still in the mix but Oregon is playing well. I don't think Oregon gets left out if they win out. I think Oregon winning out is more likely than OSU or LSU winning out, again just my opinion.