I think with Alpha senario set-up it’s a trade off in the sense that in the early game, Axis losing hardware at a ration of 1:1 is the allied player’s dream, however having those additional Japanese ground forces on the mainland make this a bit more in favor of the Axis than you may think.
In all of the games of Axis & Allies I have ever played, Getting Japanses ground forces onto the mainland has always been the strategy. So think of it this way: You sacrifice a few planes to get troops (which are the only way to win this game) that much closer to the objectives. Also to boot, you get to kill off an equal amount of enemy aircraft. (ANZAC got Neutered hard)!
Would you pay 70 IPCs to kill off 70 Ipcs of enemy planes and get 6 (free) land units 2 spaces closer to the enemy capital?