If the idea of having 240V outlets for imported European kitchen appliances does catch on you might be able to just do that
Imagine - first it's kitchen appliances, then space heaters in all other rooms, as those receptacles spread, grey imports of 230/240V entertainment equipment will go up... until lighting is the only 120V stuff left in the US
Anyway, why force Schuko countries to switch to the French system? Polarization is most important with Edison base lights and those floor and table lamps are mostly double isolated and have Euro or contour plugs that can be reversed anyway. I think having both systems and phasing out the production of proprietary plugs (making all new plugs of the combined type, I think CEE 7/7 it is) is the best solution.
Regarding the age old UK problem - what if one split up a 32 amp ring into two 16 amp radials by adding an MCB and disconnecting one part of the ring? Same amount of power available for the cost of two MCBs and French sockets can be used without any trouble.
