Believe me they are not all mainline flights. For example AA does not run 15 daily mainline flights between DFW-AUS, they use Eagle for a few. What they are doing is reducing freq. Look at the routes, all business, no vacation. Business folks like first class (higher yeild for AA) what they are doing is reducing the total number of seat, lower yeild less desirable rj's.
Here is the new service
http://www.aa.com/content/aboutUs/newServiceRoutes.jhtml;jsessionid=5W5T4WWLZ2PMREAJJMXU1DUQBFFSWVMD?anchorEvent=false
Here is the new service
http://www.aa.com/content/aboutUs/newServiceRoutes.jhtml;jsessionid=5W5T4WWLZ2PMREAJJMXU1DUQBFFSWVMD?anchorEvent=false