For example the designer in this video says no glass over glass but the control center and the lock screen are glass over glass. It looks cluttered and the legibility is horrible, as predicted by the designers here.
They probably just compiled the old UI with the new liquid glass framework without going through the design considerations that are required by the new system.
By the time of the release, it will look great if Apple doesn't shy away from letting their developers re-work everything.
What I wonder now is, why hadn't that happen already? Don't the internal developers have access to the new design and the people behind it until the last moment? If the designers of Liquid Glass and the designers of the locks screen and the control center have talked, they would have known the principles described in the WWDC video and avoid all that.