-Because anything based on ND joining a conference right now is far-fetched
-UNC and UVa can stay as long as they want, but other ACC teams will be poached, and ND certainly will not be joining that patch-work of a conference. That would not be on equal footing with the Big 12
Your whole premise of getting the ACC back to equal footing with the Big 12 is not possible. The damage has been done. Even if they somehow got ND, all the teams would need to agree to a GoR, but even then they have already given ABC their 3T rights.