If that were the pattern the ACC were following continuously, I would agree wholeheartedly with you. But, it isn't.
Texas is a Public Ivy, and, it shares it league with WVU. The four California schools in the Pac-12 are all elite academic institutions, and, they share a league with the Oregon schools, who aren't elite. Not even close.
Nebraska certainly is no academic bellwether of the plains, but, the B1G has caught no grief for adding them.
Utah and Colorado are at best average institutions, but, the Pac was not ridiculed for adding them, either.
But, the ACC is catching hell for adding Louisville, rather than UConn?