I agree. However, the days of naval gun battles are over. That ended in WWII. I feel all it will do in today's world is just make them a target for other countries like the Bismarck, Tirpitz and Yamato were during that time period.
The Iowas speed and range would keep up with today's task forces and the 16" rifles would definitely put fear into anyone on the receiving end of them.
Pipe dream though...