I think the way the Pac12 GOR agreement was described as "verbal". So that could mean very little. Something like GK saying to Presidents/AD's in a meeting "If the Pac12 gets a deal similar to Big12's, would your school renew its GOR?" I am sure they would all respond "Yea, Sure". Otherwise they might as well stop negotiating.
As you mention, there probably isn't much meat on the verbal GOR Agreement. Streaming vs. Linear, TV time slots, # prime games per school, unequal revenue sharing, etc.
That said, with the 12 team playoff, IMO the sell for unequal revenue sharing is an easier sell to schools. Especially if it is merit based AND schools feel it's a band-aid until the conference falls apart when the Big10 and/or SEC raid the Pac. The Pac playoff money will go from something like: $6.5M in 2023 to $12M in 2024 & 2025 to $22M from 2026+. So just skim a few million off the top per school and put into a performance slush fund. Also add SDSU and SMU and instead of giving them the full $22M, just give them $10-$15M and the balance in the performance slush fund. That $30M-$40M slush fund could make it easier for schools to stay put.