An international council would probably be a very fractious organisation. In Portuguese, you have the PALOP countries, Portugal, Brazil and some speakers in Goa and Macau. English is spoken as a first or main language in far more countries, including South Africa, Canada, New Zeeland, Australia, widely used in India, Pakistan, Nigeria, etc. It would be very hard to reach agreement. However, I do admire the Portuguese speaking countries for having reached an agreement and certainly wouldn't oppose such measures here. It's an issue of practicality.
I think that languages are basically self-regulating. I'm not sure that French is demonstrably healthier than English for having had the Academie.
I'd like to see changes to the spelling- the American system strikes me as more logical, but it is very hard to change the habits of a lifetime.