The total number of available athletes wont change for one and the top level athletes were never going to the smaller schools anyhow. The average level college athletes pretty much know they have virtually no shot making it to the pros and will be by and large be happy with just getting a free ride at a university. What’s going to happen is that the top level athletes, many of whom who have a legit shot at making it to the pros will start earning money sooner. Basically this will be an opportunity for those who are going to get rich playing pro ball to build upon that wealth sooner.