Guppy, this is a game, there's a reason the Allies won the war, if they got all their 1945 planes with 150 octane, very few would fly Axis planes. Same reason we don't have the AvA as the main arena. Anytime a 1944+ event shows up, the Axis side would get decimated if the Allies have the 150 octane and everything else that boosted their planes.
There's a balance between gameplay and historical accuracy, I think AH has it right. If you add in the 150 octane, it would be historical, but then gameplay would have to be rebalanced. I don't see how it can be balanced without adding an Axis superweapon. Otherwise, all you're going to see is hordes of Allied planes vs hordes of Allied planes.
The game is fine as it is, there's room for improvement, but no need for something as drastic as 150 octane.