How would merging with the PAC who was just offered a $20M/school/yr deal increase the ACC "Magnificent 7" payout? It wouldn't. You need 3/4ths vote to approve new members. That's 12 votes. So if only 4 vote no - FSU, Clemson, Miami, and one more because they are the most dissatisfied with the current distributions then that isn't going anywhere.
Maybe offering only Oregon, Washington, Stanford, Cal, and like ASU would work - paying them only $31M matching their Big12 offer. Then the difference in value goes directly to Miami, FSU, and Clemson... But the rest of PAC is dead weight
But we're right back to the problem ESPN doesn't have the money or timeslots for this. They already have 2/3rd of BIG12 to support and full SEC. There is a reason they didn't bid on PAC. They can't.