I get the feeling that the ACC views UConn as the OK looking girl that they know would gladly accept a date to the prom and will always be there waiting for the invitation. So the ACC takes their shot at what they view as more attractive partners that may help them be thought of as being part of the "popular" group. When the ACC loses the battle to be part of the popular group (i.e. when FL St, Clemson, UNC, and potentially others leave) then UConn will get the invite. Whether that is 5 or 15 years is TBD.
The question is, when the SEC, B1G, and B-12 do their poaching what will be left of the ACC. I won't be as bad as the PAC-12 decimation, but could be pretty close.
Pitt, L'ville, VaTech and NC State to the B-12
FL St and Clemson to the SEC
Virginia, UNC, Notre Dame, and maybe Duke to the B1G
That leaves a league of Syracuse, Miami Wake, Ga Tech, BC, SMU, Cal, Stanford. I would hope UConn could just join as a football only as the league has nothing of interest for basketball.