A merger does shuffle the deck for the ACC, which it badly needs, since right now it has a losing hand relative to the P2. Keeping the revenue segregated for now between the two leagues would enable this to be a low cost event for the ACC, but it would open the ACC to big new markets which its earlier Big East additions (Pitt, Syracuse, BCU) never delivered. The Big East schools have proven they can hang in hoops, and adding creating a strong network of schools in the north and east makes its existing schools more valuable. UConn, Villanova, Georgetown and St. Johns become exciting matchups for the better ACC programs, along with a reason for fans to show up at dumpster fires like Pitt, Cuse and BCU.
I don't know how you do a 29 team tournament, so there are still some things to work out on the hoops side, but this doesn't suck.
UConn football would be a useful addition, and also help make Syracuse, Pitt and BCU more relevant. It would also be a cheap one since the net benefit of bringing an entire basketball league over would more than offset any incremental cost of UConn earning its way into a membership in the ACC. There is no financial justification for the ACC ever bringing UConn over as a one-off, all sports addition.
This is the only realistic path for UConn to get into the ACC before about 2040, if ever. Or we can follow the basketball haters strategy of pining for the AAC while hoping for some P4 conference to add UConn as a one-off, full member, because that will never happen.