Not assinine--just wishful thinking on your part, IMHO.
One big reason is that ACC membership badly damaged our traditional recruiting footprint. The corollary to that is that we lost the ability to regularly play our traditional northestern (i.e., Big East) opponents which had made us attractive to recruits from the northeast. Notice that Syracuse has slumped and BC has been a total mess since joining the ACC. The ACC makes our ceiling about where Syracuse is now and our more typical position like that of BC.
If you really think that then I am not sure why you would want to continue to be a fan.
It is a good point on our recruiting footprint though. I mean other than the occasional Syracuse or BC recruit, no one in the ACC ever recruits players from our "Big East recruiting footprint".