How about a OTL Midway style victory for the RN. 4 plus carriers sunk.Obviously butterflies Coral Sea and Midway, but what will the 1942-1943 strategy be for the US and UK. OTL it was hold, beat back, and advance slowly. In this case, with the IJN offensive striking power curtailed much sooner, do we see a retraction to a more defensible line. Maybe they abandon Burma? Instead of Guadalcanal we see a multiple Iwo Jima and Okinawa type battles East and West? War ends early 1944.