Performance Improvements ETA?

I've been seeing reduced performance on Gear VR since Unity 5.1.0 whether using the legacy or built-in integration. For example, the original Game Jam build of Scorched Battalion ran at a constant 60fps most of the time in Unity 5.0.x using the default CPU/GPU throttling settings. In 5.2.0f3 using built-in VR support with Oculus Utilities, the exact same scene runs at 30fps most of the time even if I set the CPU/GPU levels to 3/3. There's also what appears to be occasional screen tearing (e.g. one frame every few seconds).