After a year and a half under APR Stage 1, the newest pcv revision finally succumbed. It seems that these things are still not bulletproof.
I was doing a general engine inspection when I noticed that there was oil dripping from the rear of the engine. A closer inspection led me to find that the valve cover gasket was leaking oil. I did not suspect PCV failure right away because normally you would also have oil leaking out of the filler cap. I had oil in the spark plug wells and all over the coils. When the valve cover gasket goes on these motors, the oil tends to leak right into the plug well. I checked the torque on the valve cover bolts and some were very loose so I figured that might have contributed to the oil leaking. On a hunch, I checked the PCV and the valve was gone. The one way valve did not function anymore. Once the one way valve failed, boost pressure pressurized the crankcase and the valve gasket was the path of least resistance.
The PCV failure cost me one coil, one valve cover gasket and a new front pcv valve. I also chose to replace the plugs at the same time since everything was soaked in oil. The coil was still functioning but oil had entered the insulating sleeve. Combined with the heat, it split the rubber sleeve.
I hope the P revision failure was more of a fluke than anything, I really would like to stay on the stock units.