2013 rocker spitting issue has been discussed many many times. Subaru has addressed this with revised part numbers. If i recall 2014+ got slightly longer valves and revised rockers so pins stopped popping.
Not much to discuss here or bicker about.
@
celek is motor god, im sure he can shed more light.
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2014 Subaru BRZ
FBM Turbokit: GTX3076R - ECUTEK HRI FlexFuel tune - FBM 3" Turboback Exhaust - 550cc Injectors - Walbro 485 Fuel Pump - 4bar Map Sensor - FBM Oil Pan - ACT SB7-XTSS - AMSOIL all fluids - Forester XT Oil Cooler - Cusco engine, trans mounts - Whiteline rear differential bushings - Perrin shifter bushing - Firehawk 235/45/17 - AEM Failsafe