It needs some more realism as far as characters actually driving the cars. As far as them clutching and yelling at opponents while racing. There should also be street cred involved in the next one. There should also be more upgrades available for cars and different colors for rims. You should be able to customize the rims more by color and size and type of rubber tire you want or need. There should also be more options as far as the the makeup of the car and the cosmetics. There also should be more garage options as to "fix & repair" the car too.
But this version is good for the second one. The 3rd should be better.