I don't think the Ranger ever Spitfires to Malta - the Wasp did it twice but the Ranger did fly USAAF P-40 groups off to West Africa and they hopped to the Middle East and India. Of course ITTL I guess the Ranger would be needed to fly Spitfires to Malta since the Wasp is already in the Pacific.
Still not sure I agree though. If we are down to two operational carriers (one damaged) in the late spring and early summer of 1942 I do not see us leaving a deck that can operate 70 aircraft whatever its flaws in the Atlantic. Especially since Torch is not until November.
Good point on the slips Andras - I guess the Ranger does not upgraded, at least not yet.
I think you could make a good argument for this Zheng He if the Japanese hadn't also lost a lot of their flat tops as well. Their urgency is there for sure but it isn't like the Kito Butai is still operating a full six fleet carriers.