I agree with kondor999 in version 2.3.1 there is too much oversteer. For all mid-engine cars, the engine works as counterweight under braking, which allows to brake more aggressively on a straight line, but also engine works as pendulum, which could cause spin if you change direction too harshly. Yes, I can confirm that real NSX (I own one) has tendention to lift off oversteering, but just a bit, often even without the need to countersteering. It's more like easy four-wheels sliding than actual oversteer. Usually, if I feel that: "Aha, I'm entering too fast and I will miss the apex a little" in medium-speed or fast turn, I just release the gas-pedal and then car starts easy sliding and when its nose looks inside the corner properly, I just loosen the steering angle a bit and stabilize sliding with gas.
Changes that I like:
1.) In 2.3.1 there is a TCS OFF light on dashboard (but it's too bright IMO).
2.) Since version 2.3, engine is more responsive, before that the car could barely move form stand still in first gear (I mean, without "drop the clutch"). Now I can finally do some doughnuts.
3.) Japanese plate numbers like in Japanese Pack. ;-)
Changes that I don't like:
Aside from over-overstering, starting from version 2.2 headlights go up and down too smoothly, which is not realistic, not to mention that there is no more light in headlights. It could be fixed by placing the lights.ksanim file from 2.1 into "animations" directory.
IRL headlights go up sharp and go down sharp (but after a small delay).
https://www.youtube.com/watch?v=mej3Sz4Ukkg
BTW, think about replacing fictional Acura NSX S1 with Acura NSX Zanardi Edition, and adding Honda NSX Type-S and Honda NSX Type-S Zero.