I've tested P3P outside with both DJI Go and Litchi (latest versions). No problems. DJI Go had some screen shuttering for first minute of the flight but it could have been busy 2.4GHz band. It settled down and was stable for the rest of the flight. I landed, exited DJI Go, power cycled RC and AC and opened Litchi. Did a 10 minute FPV flight. Zero problems. Video feed was stable. No noticeable lag.
I also recalibrated tablet's compass outside and got best calibration so for since I own Shield. Maybe it is coincidence. I'll check in a few days if it sticks.
This was by far most painless major OS update so far, even some minor ones gave more trouble then this one. GJ nVidia, I'll buy 2017 Shield TV now.