Sorry if this comes off as rude, but this right here shows that you don't understand any of what's going on. Every single team in the ACC would LOVE to leave for the B1G or SEC as early as possible. Every. Single. One.
You get more money, and you're done with the conference realignment carousel and guaranteed to be in a power conference at the end. It's an absolute no brainer.
Schools may wish it wasn't going on, or wish they didn't have to be put into this positions, sure. But if that offer came and leaving was feasible in terms of the GOR and such, every single one would jump on it in a millisecond.