There is definitely an agenda to include the U23 teams of 6, 8 or 10 of the premier league clubs. The EFL can sell Sunderland Vs Liverpool u23's a lot better than Bury vs Burton and they also believe that the Premier league will only start to share the TV money more equitably when the U23 teams are in place.
For Rotherham it means that there will likely be 8 more well funded teams trying to get into the championship (that will be the ceiling) which will make it almost impossible for us to get there and League 1 will become our championship as it were.
The EFL's plans have been knocked a little by the poor reception of the checkatrade but if crowds improve, it will only encourage them to go again.