I wish the movie had had a better story. The original was not produced with all the Hollywood fanfare in mind. This second one was meant to feed on the (perhaps unexpected) success of the first film.
Talk about the CG all you want (I agree it could have been better), but my sister told me she watched teh behind teh scenes, where they explained that the car stunts are all real, including the part with the bomb (as in, the car taking off, spinnin, landing, not the bomb unhooking part). They apparently had a very good team of engineers, etc. setting all those scenes up.