AirTran loaded a revised schedule this past weekend and it includes some interesting changes at MKE starting in June.

-MSP increases from 3 to 4 roundtrips per day.
-FLL will be flown daily instead of weeknd only
-MSY and PHX have been pulled (these don't appear to be seasonal). PHX was supposed to be 2x daily.
-The second daily flight to TPA has been cut.
-SRQ has been scaled back significantly (I believe it only operates 1x per week)

Mainline departures will be up one flight this summer vs. last summer but overall capacity seems to be flat with the use of more 717s.

The MSP flights carry overwhelming connecting traffic and the addition of the 4th flight will better support all of the capacity to BOS, LGA, and DCA.

In other competitive news, American Airlines begins flying MKE-DFW today with an all mainline schedule (3x daily M80s).