I mean the Kings didn't saw having a French elite as a threat because a lot people trading in New Orleans were French AND Spanish. Anglos too but much less. Spaniards there would eventually adopt French or English after Louisiana's annexation by the US, and many others would move to Mexico.Perhaps the French do something that they do not want the Spanish to do or the king sees having a population that does not speak your language is very risky. Although populating Louisiana I think it is more important, because it is frankly massive and first we will have to go through Louisiana (except Florida) to get to the rest, besides that the attempts to populate Louisiana could come close to Texas. Maybe they don't need the French, an Anglo revolt could have the same effect as a French revolt.