The side-by-side comparison (screenshots of old and new) on that page is telling: on the old one you see 4 flights on one page (even when the header is completely shown). The new one only shows 3, and the header is not even completely visible.
If the goal was to make us exercise our fingers by scrolling a lot more than before, it worked…

Another big step back:now, if you want to change your search criteria, you’ll have to start all over, entering destination and dates again. (What a waste of time!)