ArsTechnica published a hands on review on Android P Preview 2
A quote from the article:
New changes and new bugs make Android P 2 a mixed bag. With Google I/O winding down, we finally have a spare second to look at the newest release of Android P. The second developer preview moves the OS into "beta," and it's not just for Pixel devices, as it also runs on a host of third-party flagship phones, thanks to Project Treble.Android P Preview 2 hands on
Recent Apps, system navigation, and the settings have seen major upgrades; other than that, it looks a lot like Preview 1.