Besides cleaning the plane, I can't thing of any work rule that we flight attendants have that are more restrictive then WN that wouldn't allow better aircraft utilization. We went to FAA minimums in 2003 and it took us a letter of agreement to get 8 hours behind the door again.
I don't think that is the message AMR takes into the bankruptcy process. Link below shows there are major areas to address in F/A contract.
http://www.aanegotiations.com/documents/FANegotiationsNewsletter2.pdf