If I click on ‘Devices’', all available devices are now shown as a single continuous vertical list which has to be scrolled through.
In N5.1.1 the same Device list created additional screen-sized vertical columns displaying all available devices - this eliminated the need to scroll through the list as all devices were visible at the same time.
The list of plugins that appears when I select Insert on a track does create more than one column so that no scrolling is required, but the Devices list does not do the same any more - it was fine in N5.1