The ACC, if anything, has continuously overachieved with its TV deals, which means that they also have little incentive to expand without a big name involved.
If being the 15th winningest major college football program (20th overall) and one of the most represented schools in the NFL HoF doesn't make you "big," then I don't know what will.
As with any expansion discussion, it takes two to tango. Just because Syracuse wants to sell itself to another conference doesn't mean that anyone else is buying on the other end.
This doesn't do justice to the kind of weight Boeheim pulls at that school, and he isn't fond of all this realignment. For the ACC, Syracuse brings exactly what they want. The football is competitive enough for the bottom half of the league, and the basketball and lacrosse sell themselves. Syracuse football may not draw NYC, but its basketball does.
Granted, I think there's more to the school's mobility post-Boeheim. I doubt the school would sink a dagger into its basketball if the Big East doesn't collapse into a football/non-football break, separating the Orange from St. John's and Georgetown, but if that super conference collapses, what's keeping Syracuse to the small Catholic schools?