You cant really compare prostreet with most wanted or the likes.. its clearly purely for track racing.. havent played that far into it but i enjoyed what i did play... handling has become more intricate and i believe modding is definately more technical... I wouldnt just write this game off just yet...i dont like how theyve changed their GFX engine though, definately a little worse if you arent high specced, previous engines are much easier on the eyes.
You need too much of the latest hardware to play ProStreet at a decent framerate. Apart from that, it tries to be like the TOCA Race Driver Series with some "tuner" functionality.
The graphics aren't that "revolutionary", as EA claimed. GTR2 graphics are more or less the same quality and you can play it with a much less powerful VGA card.