The Axis don't allways do what they're supposed to do either, like invading Spain, Sweden, Turkey, Persia. If the Allies restrict themselves to historical options they will be very predictable. Historicaly the French stopped the Italian offensive against southern France and if the Germans had not overrun the French in the north the Italians may have had serious problems defending against a French offensive. The Italian military in 1939 was less than worthless, the Germans would have had a better chance of winning the war if Italy had remained neutral.
A huge improvement of this game would be to make Italy a separate power enabeling the Axis player to move Italian units prior to war entry, but forcing Italy to develop their own technology and build and reinforce their own units, it is more than rediculous that the Italian units are just as good as the Germans.
That would be a very good idea for the next patch!