Hokay, you do have to remember during the american missile crazy 50's many vessels were originally designed with no guns whatsoever, so you are right on the mark there. Fortunately, some leaders had the foresight to realize that guns still had a use in the US navy.
The barbettes on the Ragnarok, Odin, and Balder seem to be very high, and might create stability issues on the high seas. The turrets are also very tall, are they supposed to be autos?