The Wings have been 25 square feet for years. We took away dished Wings, so there is less down force. As someone who has driven & watched Winged & Non-Wing racing for many years, just leave them, alone!
I've seen many great Winged & Non-Wing races over the years & seen terrible races & drove in them, too!
It all boils down to Track Conditions!! As far as Dirt Sprint Cars!! Pavement, I've seen great Winged Racing at Toledo, Winchester, Anderson, & the list goes on! I've seen plenty of great Non-Wing pavement racing all over, too!