I suspect that the scenarios you outlined for Southwest also apply to AirTran as well. Based on what I hear, MKE-BOS/LGA/BWI/DCA/PIT/IND have been pretty empty this fall outside of some of the peak travel periods. If that's the case, it would seem to indicate that in general the West Coast, Vegas, and Florida flights had pretty decent loads (although you mentioned LAX being trimmed back some).
Since you watch the Midwest seat maps so closely, are there any particularly weak points in the Midwest E170/E190/A319 markets? I believe November was the month when many of the traditional 717 markets went E170 (due to the five E190s going to DEN).
Also of interest is the market share for some of the legacy airlines with token service to MKE. I can't believe American carried more passengers than United. It wasn't that long ago that United still had mainline service at MKE. Times certainly have changed.