UA and ASU will not want to get shut off from CA in a Pac East division. We don't want it, and from what I'm hearing, UU doesn't want it either.
When it was only the Pac-10, UA and ASU were the only teams that could try to block a Pac West/Pac East division split. Now they have two more allies that will join them, which is 1/3 of the league. As long as the 4 stay firm, there will have to be negotiation.
Hell, I'd take being in the Pac North with UU, UO, OSU, UW, WSU, Cal and Stanford before I'd want to go Pac East. Of course, the CA schools will never go for that.
There's going to be two OSUs in this conference? That alone should kick the Cowboys out.