Change the aura of GW, and you change the meaning of the country IMHO...
I believe thay are trying to enhance his image. Moving away from the grey-haired granny look, Rees is showing him for the youthful leader that he was.
GW was a larger-than-life figure -- admired by the ladies for his manly charm, and the men for his charismatic leadership.
Early accounts say that George was about 6'3" and 195lbs and was "very atheletic" (robust) in his youth, he was in his late 30's early 40's during the revolution. If you can't get a person with the same features you've lost the look...
Most Virgninians were taller and bigger, because of the hardy "stock" :)
You could tell the Virginian regiments aside from the others because of the size of the guys...