We're diluting the product for season ticket holders and fans in order to do - what, exactly? Play a football game in a stadium that's already a year old? Move from one nationally-available television channel to another? The game isn't magically going to attract more eyeballs if it moves from one city to another.
Vegas is 400 miles from Provo and in a completely different time zone. If you think we're going to have a home-field edge against Notre Dame, you don't know their fanbase. This game would be nowhere near as high-profile as you seem to think.