I've made 2 flight bookings to diff destinations since the upgrade.. 2 things I've found:

1. Clicking the airline type lunches a popup but it says component not found.

2. Advance seat reservation issues:
-button to select seat missing on some leg
-extra leg room seats indicator disappeared, or some cases, became too many and the at the wrong seat
-extra leg room seats are blocked by the system even if I'm a silver member

On all cases, I have to call reservations to put me on my preferred extra leg room seat or have it unblocked... used to do it seamlessly online..

So can't blame customers for clogging their call centers, as the system bugs prevent us from doing everything online.