they have Oregon St and Washington State. The other schools have left for greener pastures. So now they are inviting several new members in to keep their FBS standing.
They invited Utah State so of course they would love to have BYU and Utah. But that's not going to happen.
The PAC12 will also have Boise st, Colorado st, Fresno, etc so will have a nice conference. But it's not the Big XII so BYU is better off now.
It's too bad the Conference of Champions is no more. They self destructed and blew it up. It would have been so nice had they stated together and invited BYU in.