Was there ever a flexible calendar feature on the Hyatt site? I do not recall it. So not sure how you can imply that not having it is not user friendly when we never had it to begin with. Maybe they can consider it for a later release.
But I find the new expansion feature showing the reservation details a great improvement. Used to have to open up the link to that reservation to show the rate and such. now just click the + icon and the reservation details will expand out under it. ^^^
Think the overall design of the Account Activity page to be top notch.