But - how significant are the new changes

[K K Rossokolski]

I begin to understand the rationale....basically, these things are eye candy. Certainly, there was nothing sillier than the little naval gun icons, when used on the screen. In principle, your solution seems reasonable.. BUT An issue with the ships in harbour could be that CS is largely all or nothing when it comes to destruction. Ships are more commonly damaged rather than sunk outright , and CS might not cater for this well at all. I am no longer much interested in numbers...is it within the probabilities of the game that a battleship could be sunk by say a Tiger, or a 170mm shell. If so, just silly.
I remain deeply concerned about the existence within CS of units of doubtful pedigree and TOTALLY opposed to the bizarre non-flying long range bomb shooters, and of couse the simply absurd alleged "submarine." These latter might be at home in a freak show, but not here.

You might consider a caveat in the manual to the effect that these things are just for show, not for (simulated) real and shouldn't be used.