Yes! the pedestrian tunnel is a MUST.
I would like to see three levels, a large lower level and gear those tickets to recent grads, reasonably priced season tickets. The club level right above that but make it like an "entry level" for people who want to be big dog boosters in the future, treat them well early and get their money later. This level would also include entertaining space that can be rented out for parties, weddings, etc. Then the top level have dirt cheap season tickets, cheapest in the BCS to ensure it's always full.