A month ago the PL would have been very happy with this intervention by UEFA, as it backs up their claim that football can govern itself, but Nick de Marco/Leicester City have shown that their rules can be picked apart.
The UEFA letter mentions that governance should be by the FA, the problem with that is over the past few decades the FA now only really look after the national teams/grassroots football etc, where the PL/EFL/National League are governing their own leagues.
Be interesting how this plays out, as the selling point of the IFR was to stop the larger clubs breaking away to form a SL and rogue owners so another Bury can't happen again.