Can I ask where you park the helicopter on the Roon-class? I ask because you appear to have VLS cells where I think the hangar would normally be...
Also, not sure, as modern-era stuff I've not done an enormous amount of research on, but I'm unsure how you are guiding your missiles.
Also, have you checked the deck heights on the earlier ships? The spotting tops look to be about eight feet in height, not sure how much room that leaves inside for people.
The hanger is offset to the starboard side while the VLS is to the portside.
I know very little about radars so I am not sure myself.
There should be plenty of room inside the spotting tops but I will double check.
While I won't comment on any major design issues, I will say two things: First off, why two rudders, one big and one small (ignoring the fact that rudders may be side-by-side), on the battleship?
Second offly, it's not standard to outline flags in black, and IMHO looks... horrible. If you absolutely feel that they need to be outlined, go with a lighter color than black. It'd also look nicer to add some ruffles in the flag. Right now it looks... artificial.
The second smaller rudder is to mainly help in port and during low speed maneuvering.
It is attaclly outlined in a very dark gray in inside of the flag is black so I need an outline.