taken both UT and BYU but instead went for UT and Colorado when those two schools entered the PAC. The are multiple reasons for that but the same reasoning that existed then exists now.
BYU isn't a good fit for the PAC, it won't happen.
I grew up in WA and hate both the Huskies and the PAC. I don't want to see our Cougs in the PAC - we're not welcome there.