It doesn't really matter, as the main focus of design, at least initially, and as product in current form, is made to cater FUN, Agility, and joys of sports car driving, for those who enjoy the tactile sensations, and precision of a driver's tool for the road, and less as specs leader for simple number games.
Very few cars can mimic the FRS in this sense, and nothing else right now comes close in the price category (new) except maybe the Mazda Miata...which is a bit more dedicated to the occasion, and less practical.
If you get the idea, and value this, this is the car.
If the performance numbers matter more to you, then move on to something else, I think.
This is the most fair way of saying this car is not for everyone.
Yes, with higher performance tires, it will generate better cornering, and braking. However, the reason the designers chose the modest tires is to provide a good fun balance of grip for learning to drive on the edge without the peaky characters of high-grip tires, or the expenses. It also provides the milder motions, communicative feedback, and predictable handling for those who aspire to learn how to drive better as dynamic driver. Higher performance cars, rarely are very forgiving to drive near the limits without the aid of electronics and sophisicated and expensive driveline and driver assist devices and makes the driving experience less engaging sometimes, and vehicles much more expensive.