Tried this in my most recent game, but essentially I just moved the bulk of the LW to North Africa, then secondarily western Europe and Italy theater boxes. Got naval over 300% in North Africa which led to events most turns where I had a naval success which delayed the fall of North Africa. Similar events for being over garrison in WE.
I basically shifted all my recon, most bombers, and then kept fighters for the most part on the Eastern Front with very little usage, and new formations generally sent to theater boxes.
Overall, seems gamey of course, but I still slaughtered the Soviet Airforce in the air when they came up to support their ground forces and I didnt see much impact on CV and reached Leningrad in August, captured it in September, and was encircling Moscow by early October and had reach a line of Tula - Kharkov/Kursk - Stalino - Rostov also and hit the 700 auto win which I candidly didn't really want to do. I was super aggressive with motorized/panzers and didn't worry about getting them isolated, just bypassed soviet formations and pushed them way out in front and had estonia secured in 3 turns and to leningrad from the west (Talinn) and south by Pskov - Novgorod with separate spearheads.
Interested in any feedback or perspective on this approach, particularly the air war decision as I was hoping to see stable secondary theaters longterm which would prevent italian collapse and allow more emphasis on beating the reds.