I was doing some reading these past few hours on the tank battles of WWII, and much ado was made of the differences the training and experience of a tank crew and how it effected the actual performance of the tank. No surprise there. Then I got to thinking of AH and how some of the vehicles are same-same in areas in which the players have no control over. Players can fly or drive and they can aim and fire the weapons. The computer controls the reload times of the tank guns. Since players are not able to flip levers, grab shells, load cannons, etc, it is understandable that the action of reloading the tank gun is automated.
I simply propose to change the reload rates on the main guns of the tanks every so often to imitate the effectiveness of well trained or well experienced crew. I have 2 printed sources that reference actual WWII German military documentation on the Panther's rate of fire being between 6 and 10 rounds a minute. In AH, the reload rate is spot on at 6 seconds (obviously AH Panthers are stocked with well trained and experienced crews

). Other tanks are no different, I'd be willing to bet that the same T34/76 crew that had an average reload rate of 8 seconds in 1942 was a bit less in 1945. Same goes for the veteran Panzer IV and Sherman crew. Yeah, it might throw the ENY rating off a wee bit, but I'm betting not much more than 5 points either way.