The Big 12 in 2012, while having OU and Texas, was legitimately fighting for its life. They were frankly desperate. Currently we are talking about voluntary expansion in response to the SEC consolidation of power. That alters the equation from the last time WVU was considered. Big 10 has no need to make a rash move and doesn't benefit unless it makes a big move like the SEC did. I doubt a big move by the Big 10 to compete with UT and Oklahoma joining the SEC will involve WVU. PAC 12 is just a geographical non starter.
That leaves the ACC if WVU does not remain with the Big 12 leftovers. The ACC likely won't be as desperate as the Big 12 was in 2012 unless they lose a couple of teams. So as of now the ACC doesn't have to make a move at all and can carefully weigh the value of WVU, if adding WVU helps insulate the conference from complete destruction should the ACC's top get poached, and/or if adding WVU is a good move to cut the knees out of the Big 12's attempt to survive as a possible competitor conference.
I'm not saying WVU doesn't survive at least this round of conference consolidation, but I am saying that there is not a really desperate suitor out there like the last time which hurts our chances.