Among the many problems with this idea: it will inherently crowd out all but the very best incoming fteshmen. And for those who do get in, welcome to the up-or-out business model, applied every year.
Coaches across sports are incentivized to win now, or you're fired. So when supply is expanded, demand will expand to match. (And with NIL, grad supply will expand until burnout.) Development will be for somebody else.
If this ever happens, the only solution is no roster limits AND no requirement that everyone gets a full ride.