The “can opener” tactic has always been part of AA. The UK opens doors for the US all the time on land or at sea in both theaters. It wasn’t until Italy became a power that it became more prominent (axis vs Russia). Russia gets beefed up a little to compensate, and it has allies to bail them out.
Make_It_Round has a great point about countering week Russian advances w/UK or US air (or ground forces) to force Italy to think twice about attacking in the first place (or at least cost them if they do). If both euro axis want to play in Eastern Europe then you have to get UK/US in there as well. A strong UK/US naval presence heading toward Italy will also turn those Italians around (love to see them waffle).
Another thing would be to close the Black Sea (errata/faq option in AA50). Don’t allow Italy to use its navy to aid in taking key tt. We at times have not totally closed the Black Sea, but axis would need to hold all 4 tt that boarder Turkey in AA50 to enter (we call it political pressure). In AA 40 global you will need to invade Turkey (new straight rule) to gain access to the Black Sea, so this should slow them a bit.
As we add more minor powers there will be more double teaming going on by both sides. UK (India) and Anzac both go before US in global, you only think Russia has problems. You have to be aware and see at least into the next round of play so you can prepare.