Did Courageous and Glorious have armoured flight decks, and where would that leave them later in the war?
Short answerNo. Their most plausible roles are in the Atlantic, perhaps the Indian Ocean, and in aviation support rather than the late Pacific front line.
NotesNeither ship had an armoured flight deck. In this counterfactual, that limitation helps define their most plausible later-war employment rather than making them useless. Atlantic service, possible Indian Ocean work, and duties resembling some of HMS Unicorn's support functions remain plausible. Protection, range, and aircraft capacity together shape theatre assignment even after a successful modernization.