I think each website has it's strong points, and while the CO website does shine in some areas, it can be rather overrated (just as I think UA's site is somewhat underrated.)

Anyways as long as they can maintain the functionality of what UA can currently do today (read: UA's GUI), I guess the specific back end host is somewhat irrelevant, but still it'll be an interesting time come Customer Day One.

W/r/t *A, IIRC the master plan is to eventually transition to a shared IT platform based on Amadeus 2.0 but who knows when that's going to reach technical viability, much less be ready for rollout across the *A partners. Also of note is that Amadeus was based off SHARES 'back in the day and of course SHARES became the successor to EA's SystemOne when a near-dead CO sold it off to EDS (now HP) in the early 90's to raise cash.