I agree with the Light, Medium, and Heavy Armor rules, however, the heavy armor of WWII were as their name implies: Heavy.  This meant that they were very slow moving and were mainly used as a defense by Hitler.  Therefore, I think that their stats should be 4/4/1/8, and they take 2 hits of damage and can be repaired at a friendly IC. 
Also, I think that all nations but Germany should start the game with Light tanks as the placement.  Italy’s tanks were so inferior that Rommel was disgusted with them.  The Japanese and Americans needed light tanks to go through the tight jungle terrains.  The UK and French tanks were easily overwhelmed during the German invasion of France in 1940, as they were lightly gunned and intended for close infantry support.  The Russians had to adapt their tanks into what was considered the best medium tank of the war.  But that was not until like 1941, during the German invasion of Russia.