If ND can get that kind of money with an independent deal with NBC, then it doesn't have to pay a dime to the ACC to get that.
Everything else stays the same. ND would get around $90-95 million a year (with ACC partial payment and ACC Network full share) and no legal fees, exit fees, GOR buyout, etc..
Then, the clock continues to tick/wind down on the ACC GOR and other contracts and ND is still sitting there, with options (unless the Big Ten or SEC won't want them then, a risk ND is willing to take).