From a fan's dreaming mind, I'd love to see two things...
Danville run the Sundays early in the year and late in the year when Kokomo is idle.
Putnamville run midgets once a month, with no conflicts, and on those Saturdays, Danville runs sprint cars.
Or Putnamville just throw midgets in with the sprint cars once a month, and Danville can run on Fridays when Gas City or Bloomington is off in addition to those Sundays.

Those might not work, but one of those would make me happy...