ACL is right... the economy overshadows all of this. Right now, things are touch and go at best. Currently, there are 3 million less passengers PER MONTH flying domestically industry wide than there were in 2007.
The reasons why are one thing, but when running an airline profitably is the main consideration, growth into these kinds of numbers would be a disaster.
SD's letter about waiting for marketing's plan is essentially saying the same thing. The tea leaves point towards more shrinkage right now... it's just not a good economy.