Aaron, what I expect is that EAA should cater to all aviation and especially Sport Aviation not business aviation. And EAA should be working to see that all local public airports are open to sport aviation where possible. I don't expect Sport Aviation at ORD, but KOSH should be open to non radio sport pilots in some way. I checked the KOSH live cams yesterday, and didn't see any air traffic at all, just two days after Airventure.
I am still trying to find current numbers for KOSH revenue operations.
I just read an article in my local paper here, it said my local airport has had it's scheduled air service cut from 6 flights down to two per day. There never was a tower here. ( Fairchild International, Port Angeles, WA.)
edit, according to Wikipedia, KOSH doesn't have airline service now since 2003. So I remain confused why the Class D remains.
http://en.m.wikipedia.org/wiki/Wittman_Regional_Airport