I don’t think either team should feel obligated to play each other, but from my experience, a good spirited rivalry makes games a lot more fun. I’d much rather play USU than San Jose State or Northern Illinois.
At the very least I would like to see us put more former Mountain West teams on the schedule (though maybe not Air Force). CSU, New Mexico, or Wyoming could be fun.
An annual game against TCU would be awesome though I doubt either school would agree to it.