Seriously, why does this question keep getting asked? There are a few fans in the 'Bama camp that are completely ignorant of the situation outside of Alabama.
Utah would jump to the PAC-1 in a heartbeat. They have done everything in their power to lobby for it, the sports fit, the academics fit, the region fits. But they've locked their door and aren't inviting anyone in. It isn't as simple as Utah saying "I think we'll play in the Pac-1 now". You need to be invited.
Utah isn't trying to keep the schedule light. They want the challenge, they want the shot at the title. Our coaching is top notch, we've got great facilities and a great location. If we added inclusion in a BCS conference to our arsenal our recruiting would get even better. Our schemes and coaching are competitive without the "BCS talent" imagine if we could increase our recruiting and our depth.
Utah is a team that could potentially have two Championships this decade if a playoff was in place. That is something that any of the elite college programs would hope for. But a crappy system keeps us out of the running. We'd love the access and inclusion but the system is what it is.
Sorry for the rant. I just get tired of ignorant people saying "just move to a new conference then." It just doesn't work like that.