I cant say I have ever heard of someone saying it shifts too soft! But to each their own. There are some tuners out there, but im not sure what they do for transmission shift points. I do know this, if you drive the vehicle more agressively, it will adapt to your driving style eventually. Side effects will be down fuel mileage and increased wear on a number of components. Nissan spends a lot of time/money on trying to make sure you dont really feel the shift at all. No, you dont have to bypass the radiator i a 09. The transmissions in these things are rather spendy, keep that in mind.