Benefit would be two fold: recruiting Polys (even the ones from the mainland would love to have games in Hawaii); guarantee a 7 home games any given year.
Play week 0 @Hawaii with a P4 week 1 and a FCS week 2. Get nice ramp up for the season, and 13 games (at least 7 at home), every year. (And, selfishly, I get to see one more game each year.)