One thing i would like to see is an accuracy penalty for beeing under fire. A major factor in the good accuracy of SMS Derfflinger during the "Run to the South" at Jutland was that it was left unengaged by the british Battlecruisers because of a targeting error.
Also i think the time it takes for a ship to "get" the range is a bit short and it should be possible for a ship to "loose" the range if the target manouvers .