The Kibbie Dome is different currently the capacity makes that a negative. Expansion would turn it into a positive and of course some positive points are already there.

The dome is fourteen stories high and the end walls are easy to expand into for end zone seating.
The giant pillars that supports the barrel arched roof can support small upper decks. The stands are to far from the field so a dig down will add four thousand seats. So twenty two thousand seats on the sidelines. Now a conventional dome built to seat eighteen thousand would not have the expansion options .