I hate to say it but I feel KGF is alive and well especially with NOs. The reason is Russia. In a proper KGF Russia should have an income of atleast 40 IPC if not more. (+5 for fin/nor / +15 NOs). This allows Russia to survive against Japan for a good amount of time. Whereas in a KJF game, Russia is usually reduced to around 20-25 IPCs, even less once you start landing UK/US figs in moscow to keep it alive, while germany is making 50-60+ and italy 10-20+.
Also, while on paper it looks easier to defend against KGF with Italy, that is just not true! It is even more difficult esp with the value of France. It is easy for the US to threaten Italy and retake africa / meeting the japs in egypt while the UK trades france or poland or wherever they want to be. Then you can threaten to do a double drop on France to take and hold, or threaten Italy, or threaten germany forcing the germans to pull back from russia. Add in some SBR for good measure and Europe is yours. It just takes some skilled Russian play in pushing Germany back by T3-4.
On top of that, Japan makes more money than the US by the end of turn 3 no matter what you do and there is absolutely no way to defend southern asia or keep china in the game. Well I suppose you could abandon moscow, but yeah bad idea. Oh and good luck defending Russia from 70 IPCs of Germany/Italy with can openers and all that Jazz.
Add in the fact that most German openings leave a portion of the UK fleet alive, try to threaten Karelia with overwhelming force, and only leave token troops on France and why wouldn’t you go after them? Add to that the fact that Japan’s opening moves typically pose absolutely no threat to anyone (other than IPCs you cant defend anyway!) until J3 at the earliest, usually not until J4, and why wouldn’t you ignore them?
I really think the key to stopping KGF is to rethink typical G/J turn 1 moves. To what I don’t know, but right now Germany screams “kill me or I kill russia” and Japan screams “i’m huge but can’t reach just yet”. I’m also speaking of when NOs are being used.