And it will continue to be useless for what Xiaomi claims is the patch's purpose, because the same "private" APK data can be pulled unmodified from the same dev

And it will continue to be useless for what Xiaomi claims is the patch's purpose, because the same "private" APK data can be pulled unmodified from the same device with a userdebug build, or from the numerous devices available which do not have this patch applied.