This is the correct answer. They were trying to do something special and highlight the band with their own dedicated area right at field level, something that is not common. Of course, then everybody shits all over it if it's not perfect. The easy answer is to do exactly as you describe; blow up the band pit, make it match the adjacent seating areas, and stick the band in the section next to the student section in one of the corners like almost every other college stadium. If the band grows/shrinks, you just sell more or less seats behind them in that section. Additionally, the higher they are, the better the sound carries.