This is about the THREAT of adding UMass. The acc tried to destroy the big east in 2003, we found 3 good replacements and it did not work. They are trying again to destroy the big east again, but they haven't quite done it. If it was proposed that the big east was going to go to 12 schools and keep the catholics, adding rivalry schools for current members: Houston for TCU, Central FL for USF(competition for miami, fsu), ECU (competition for the carolina acc schools),UMass(competition for bc)Temple and Villanova(takes over philly), then perhaps the Big East retains its BCS. Does the acc want to wait for all of this to MIGHT happen and then pick off UCONN or Rutgers a few years down the road afterwards? It doesn't matter if the new schools are not good right at this moment, they could be in short order(UCONN, USF). The threat of keeping the basketball onlies keeps the big east very strong in basketball still.
This is all hypothetical that is leaked to the press by UCONN or Rutgers. The acc could dismiss it, but the big east is still around after 2 attempts to destroy it. If the acc takes UCONN and Rutgers now they destroy the big east for good. If the acc waits, they get a bunch more competition they didn't plan on. If they are waiting on ND,who says you have to stop at 16, take them as #17. It also makes ND decide quicker.
This is something UCONN does not want to do for real unless we don't get a seat at the super conference table. The problem is the longer we wait, the tougher it will be to recruit because all of the other coaches will tell the kids that the big east will be losing their BCS. If we have to wait 3-5 years to get in our product won't be very good and it would take much longer to build back up.