If you ask anyone in construction, they will tell you it's much easier to start from scratch then to rebuild from existing structure. It can be done however, but it's costly and time consumming, because one wrong move and the stucture falls to pieces. In order to do this sucessfully, everyone needs to agree upon the new plan before construction can start. This is the one thing that has become a major stumbling block for US Airways. Unlike a building, the market keeps changing, day by day, so it's even more important to make adjustments along the way, and make them quickly. Dealing with such a large company such as US Airways, this is proving to be impossible task.
It would be exciting to see US Airways go in a new direction and play offense rather then defense for a change. If they can afford match the LCC in price and ammenities like Jet Blue in coach, fly to international destinations, and have world wide alliances. US Airways could and would be a powerful force in the industry. Most of the pieces are already there, but if the flights are full, and your still losing money it will be difficult to go much futher with out making a change.