I am not sure what you mean by that. What you envision is nearly the same as what the French did OTL. They exactly tried to show that staying in close they created a French educated ruling class, with infrastructure designed to extract that countries resource and of course keep French businesses dominant. They never really left their colonies. They moved from the Governor's palace to the Central Banks and their Embassies. They retained control over lot of the natural resources, their currency (whose value they remained unchanged while devaluing the Franc to be able to further exploit them as a benefit, as the higher value of the African currencies meant that exports became cheaper while domestic industries couldn't take hold and close association with the French meant that French Countries dominated their economies) and regularly sponsored coups to keep the countries that chose to be independent in line. The currency control has led to decades long stagnation of the economies of their African colonies.
Guinea dared to reject this "generous" offer and paid for it by having their economy ruined by the French as during the withdrawal they destroyed infrastructure and things like light bulbs and medicines to avoid them being used by the Guinea's independent government. The Dutch did everything in their power to take back Indonesia and impose a similar deal of free trade and close association like France OTL but the Indonesian nationalists were strong enough to resist the Dutch. You call this to be enlightened? This awful concept of "mother countries" is greatly disturbing as for the non settler colonies, it means, for the lack of a better word, shit. The only place the French left honorably was its Indian territories, which were tiny and their survival was completely dependent upon India.
India getting greater autonomy was a done deal as the nationalists went from strength to strength and ITTL preparations for future combat, like mobilization plans mean that Indian industries were put into war production earlier than OTL, makes the hands of the Indian nationalists stronger. Individual satyagraha promoted by Gandhi probably continues but I don't think that there would be anything like the Quit India Movement to gut the Congress, so they would be in a much stronger bargaining position. Incremental autonomy was granted by the British to the Indians and meaningful autonomy was granted after the first world war and would continue. But that does not make them any better. Through a variety of means like exorbitant salaries to those British officials posted in India, free trade coupled with a plethora of policies to hamper Indian industries. The author has decided to completely ignore the subject of Bengal famine by simply importing food from Burma, which is reasonable given the event ITTL. It was caused by loss of Burma, a lean harvest, Food from rest of India being diverted elsewhere, the British destroying the boats, which formed a vital part of internal transport in Bengal, creating pockets of abundance and areas with no food, not making effort to redirect food, etc. The acts of the administration was immensely negligent and apathetic. This is not the only man made famine in British India. While historians are divided as to whether Holodomor was a genocide with most agreeing but rarely does any such attention is received by the multiple famines in India which resulted in far more deaths. During the wartime, the Administration in India made no efforts to check inflation unlike Canada, Australia or UK itself. Hundreds of miles of railways were dismantled OTL and sent to the middle east along with the rolling stock. They blocked the creation of automobile and medicine factories to protect the British producers. What capacity of automotive and shipbuilding production existed was underutilized and orders were placed with foreign goods.
While Indochina may be liberated peacefully, if the Indian Army is used to occupy the territory until the French rebuilt their administration or till the brought in their own troops then in that case defections among Indian troops and mutinous attitudes can be seen like we saw OTL in Indonesia. If the Nationalist Chinese occupy Northern Vietnam ITTL and they also win the civil war then in that case VNQDD will become a significant force that will cause endless headaches for the French with support from China and possibly even the United States.