The p38 doesn't reset the EAS all the time. Yes, it will 'adjust' itself to keep the corners within the target heights, but it doesn't do a full reset.
It will also only open valves on a single axle at a time - it won't open all 4 - so the scenario of the front dropping under braking and the air being pushed to the rear just won't happen. You can see this happening under normal operation - if you select a height, then if going up - the rear axle gets raised first, and then the front will come up. When dropping in height the front will go down first and then the rear will follow. I believe to stop the headlights from being shone upwards to possibly dazzle other drivers.
The ONLY time the P38 will cross link an axle is when you have your foot on the brakes and the road speed is down to nearly zero. It will then open both valves on the front axle to level it side-to-side - again I believe to make sure the headlights are level when you stop. It doesn't do this on the rear axle though. So if the brake inhibit is bypassed, then chances are it won't even do that.
I personally wouldn't disable the brake inhibit, but each to their own.
I've also had a few moments of there nearly being more skidmarks than just on the road. the most memorable of late being on a country road in Ireland, coming around a blind bend to be dazzled by the high beams of a stationary vehicle on the other side of the road. Flashed him and the high beams went off to reveal a tractor/trailer pulling into the farm. Had to STAMP on the brakes and swerve to miss it and it didn't feel like it was going to roll anywhere, but to this day I have no idea how I didn't hit the trailer. If the moron didn't have his high beams on, then I would have seen it a couple of seconds earlier. But was very glad I was in the RR!