TWA Fan,
I am not sure what kellner has done is much different than what Bethune would have done in the same climate, they are still good friends and no doubt Kellner takes Bethune's advice in many matters (in private). i am not saying Kellner is a Bethune in any way they had/have vastly different leadership styles, but in the end I am not sure the results would have been much different.
I do however think Bethune may have been able to get more concessions out of Boeing for the massive 787 delays that have plauged the program and messed up much of COs planning, or lack thereof. CO banked on the 787 program WAY too much without additional 777/767s in the fleet as a stopgap.