Serie C (Next Gen) is only for recovery for players like Kaio Jorge. But due to the transfer window he would either have to drift between NG and first team or NG and loan in January. It's not ideal but he's been out for so long I'm not sure what 6 month's difference is going to make.
The idea of U23 sides is good simply for professional football experience. It's why Atalanta have also come on board, and they will probably benefit from it even more than us as they have a better youth system and more space for youngsters.