Finally!
It feels like one step forward, two steps back though.. you can no longer get the date grid of fares to appear when booking as they have removed the "Flexible dates" option in this new version. So it's impossible to compare fares over a date range in Premium, for example.
Also if you're looking for a Premium or Upper flight and select that as the cabin, the search results are the same regardless of what you select and show all cabins. Worse, on mobile, select Premium or Upper and you'll just be shown the fares for Economy Light.
Does no-one test this stuff before they send it out!