I actually think BYU's best chance is some scenario where
the PAC is forced to swallow it's left wing pride and invite BYU.
But I don't see this happening for quite some time (if ever). And it will only happen if:
(1) All of the other major conferences go to 14 or more; and
(2) Every attractive candidate East of the Rockies, particularly Texas, is totally off the table for the PAC.
And even if the above happen, the PAC isn't going to just suddenly invite BYU. For example, even if all the other major conferences go to 14 or more, I expect the PAC to spend years trying to devise every scheme under the sun to attract candidates East of the Rockies, most particularly Texas.
But if the PAC decides they need to expand to at least 14 and all their targets East of the Rockies are fat and happy where they are (after multiple attempts to try to lure them away), at some point, I believe they will be forced to take BYU.
Despite their prejudices, BYU is a FAR better candidate than anyone else in the West. Boise? Please. Cal State schools? Please. UNLV? Please. New Mexico? Please. Hawaii? (believe it or not, I think they'd actually be more attractive than any of the above but still nowhere near as attractive as BYU).
Think of it like the Evangelical Christians holding their noses and voting for Romney. From the PAC's perspective, BYU has a lot of warts, but everyone other Western candidate for inclusion has more warts. And, on the other side of the coin, BYU brings far more to the table than any other Western candidate.
In short, it's anything but a given and if it happens, it's not going to be for a while. But, IMO it's BYU's best shot of ever being in a legitimate top-tier league.
"I don't know what kind of person would do something like that. Obviously a very sick person, a very immature person, a person who has no regard for wasting other people's valuable time."