I think that if England got title to France, it would have a much better chance holding onto a core of France and the West of Francehan it would the entirety of all of what we now consider France. And I think that the hardest part of France for England to hold on to would be Langedoc and Provence, partly because of geographic distance, partly because the countryside of France's Massif Central is as broken as Western Appalachia in the US and partly because France had only subdued Langd'Oc 150 years previously after 50 hard years of blood and siege and crusade against the Cathars. I think that there would be an excellent chance of Langd'Oc nobility supporting, say, Ferdinand of Aragon, recreating the realm of Septimania that had existed 1000 years peviously.
Burgundy, also, might separate from France, tying in more with the Low Countries and creating a buffer between "Frengland" and the Holy Roman Empire. Maybe no Italian Wars between "Frengland" and Spain. The rest of France, from Artois to Gascony could well remain tied to England.
And if Ferdinand married Isabela ITTL there would likely be a very interesting Empire surrounding the Western Mediterranean from Iberia into much of Italy to Sicily. If not, an independent Catalonia-Occitaniia evemtualy perhaps.