Excellent write up! Even with the sport suspension, I feel the car has more sway than I’d like. I echo that the stock seats are not great for track purposes.
I haven’t noticed any drop in power issues mid corner. Bypass valve seems to function in a linear fashion with the throttle. Perhaps the bypass valve is faulty?
https://www.emiraforum.com/threads/loss-of-power-supercharger-bypass-valve-issue.4966/
I’ve been running DS1.11 pads FRP3084W / FRP3083W. Great consistent pedal feel and modulation on track. They can be a bit harsh to modulate when cold on the street. Stock fluid was okay first track day, but needed upgrading second track weekend.