For these ratings, let say there is a 99 overall QB. Lets say its Bridgewater, there is no way that he should enter the NFL anywhere close to that 99 rating. Compared to the rest of the college players, he is a beast, however when he moves to the NFL, he cant have the same ratings, except maybe arm strength. Even accuracy would change, as he has to adapt to the speed of the pro game, therefore probably rushing a few throws, or just having a case of the yips in the pocket.
I think that the ratings should be lowered, otherwise, you will be having a draft class full of all pros each and every year