Just off the bat, it looks a lot easier to read and understand. The current design might be done to support older browsers but I think most of the users should not be punished for the few who still use older browsers.
United's current website is Continental's website pre-merger. It's the same design they've used for nearly eight years and it's really showing.
United's pre-merger site wasn't anything really spectacular, but it was still better than what they're putting up there now.