The Bosman ruling was nothing to do with players moving from the EU Gurnelista, pre Bosman players weren’t free to leave their club without a transfer fee (unless agreed) now they can just walk away and can even negotiate a deal with another club with a year left of there contract to go, hence why transfer fee tribunals were set up to protect clubs who developed young players,walking away with no fee at all.
It’s literally a piece of EU legislation. One which I presume will still apply come January, just that foreign players will be subject to much stricter immigration regulations. But it will still apply to domestic transfers, as far as I know.