Love the mod, first of all!

However, I do not like the way divisions template look like late WW2 divisions with 7 infantry battallions and 2 artillery. I know this is to make them optimal with combat width 20, but it takes away from immersion. Historically all mayor powers started the war with "square" four-regiment divisions with 12 battallions and later reorganized to "triangular" divisions of three regiments with nine battalions.

Might I suggest that instead of optimizing the template to fit the ideal 20-width, you tamper with the width of the battallions instead?

Just for fun, I tried to set artillery width to 1 (reasoning that they stand behind the front line infantry anyway) and infantry width to 1.5. This resulted in a fairly historical 12 battalion division with the two arty battalions that represent the correct number of guns (72) for the typical artillery regiment having combat width 20.

From there, the player could later choose to go down to nine battalions in order to save manpower. This will result in a 15.5 width division, which will allow you to cram five instead of four in a frontal assault. The main reason for doing so, however, should not be to optimise your frontage, but for reasons historical, i.e. you're running out of men but have guns to spare.