I feel the best and easiest upgrade is to add lightness. The car is nearly 3900lbs. Dropping weight will benefit every aspect from suspension, acceleration, and braking with perhaps a wash or a slight detriment to comfort?
I wish they had carbon fiber wheel and bucket seat factory options for NC1.
The C8 Z06 carbon wheels shaved 40lbs of rotating mass. Improvement with that alone shaved 1.5 sec off 2 mile track on Z06 vs standard wheels.
These are made by Carbon Revolution which is also OEM manufacture for Ferrari (Pista, F8, SF90), and Ford (Ford GT, GT350/500). On Ferrari the weight saving is 48lbs or 50lbs with titanium wheel bolts over standard. Having driven both standard wheels vs carbon wheels. They make noticeable difference. Even steering feels better, car overall feels much more responsive.
There are some really comfortable carbon bucket seats out there with zero compromise to comfort (Mclaren/Ferrari), on par or better than NA2 NSX-R seats. The seats not only shaved a lot of weight without electronic adjustments, but it gives the car much more emotional feel. Not all bucket seats are super narrow and hard to get in and out. The NC1 and Type S seats are comfy, but too cushy and sits too high for my taste, makes the car feels too grand tourer imo. I much rather have manual sliding comfortable sport seats.