1) That only works if Utah also beats USC to get Ohio St into the playoff

Otherwise you end up with

1. Georgia (CFP)
2. TCU (CFP)
3. USC (CFP)
4. Michigan (CFP)
5. Ohio St (at-large)
6. Alabama (SEC)
7. Tennessee (at-large)
8. Penn St .... out of NY6

with Purdue, Washington, Tulane/UCF, Clemson/UNC and Kansas St claiming the rest as auto-bids.  You haven't changed the number of B1G teams in the NY6.  By elevating Purdue in, you've knocked Penn St out.

2) even if you somehow end up with 4 B1G teams in NY6 games (which 100% requires USC lose), then it's not a guarantee that BYU gets the Guaranteed Rate Bowl.  In that case, BYU may be selected for the Guaranteed Rate Bowl.  But they also have other options.  Given our 7-5 performance this year, they might or might not opt to select BYU for that bowl even if there is a spot available.