In every negotiation, there is the desired outcome and then the fallback.
The desired outcome is to be on par with the SEC and Big 10. That goal seems out of reach for, among other reasons, the one Pilch mentions above.
The fallback is to survive, and to avoid yearly games with Elon and Memphis. That might be the best use of the ACC's efforts. In that case, adding WV probably helps. Though if the Big 12 scoops up a few Pac 12 teams, why would WV leave? Additionally, any school who whose desired outcome is to leave the ACC isn't going to be very amenable to anything that further binds them to a surviving ACC (this is how we'll know who actually wants out).
I'm not generally an alarmist, but the medium and longterm prospects for the ACC don't look great. In that case, it's time to focus on the fallback.