I think the creators need to take a look at the American secondary guns. On the Atlantic class they have mid-range 5 inch guns on all the battleships they're nowhere near the range of the Atlanta.
Then you have the Timmerman which has a really long range set of 5 inch guns. All the American 5-inch guns should have the same range in same damage points. It is unfair that the German ships start firing at greater range than the Americans, and all other nations