I think due to the fact we are now at the end of the era of ICE, and the fact that F1 wants to be carbon neutral (LOL) then they should move back to a fixed design car for all teams, with only the driver and strategy being the differences.
Its unlikely anything in F1 will make it into a production car anymore, and instead of wasting billions $'s a year on car development and engine supply etc. Just stick with a fixed car, no arguments as to what is legal, everyone has the same chance of parts or power unit failure, and they could license the deal ever 2/3 years to different manufacturers.