As Frontier announced that a new winter schedule was loaded, I was only checking dates later this fall/early winter 2012.

Looking at the summer schedule, some noteworthy adjustments appear to have been made as well:

MKE-LAX/SFO nonstops appear to be gone.
MKE-SAN appears to operate only on Saturdays
MKE-SEA stills seems to operate less than daily
MKE-RDU appears to be gone by June.