In a blow to the custom themers out there, Google has responded to the cry for Substratum "support" to return to stock Android. The verdict is that the breakage first spotted in Android P Developer Preview 1 is intentional and that it won't be fixed for the final P release.
Google Has Released Android P Beta 2
Google has released Android P Beta 2. Android P Beta 2 includes the final Android P APIs, latest system images, display cutout support, and more.