Pitting a 15k ton ship vs a 45k-57k ton, and ignoring the 15k ton ship's antiship armament proves what now? If you're going to pit a battleship you should be bringing out the WW1 HMS Dreadnought or earlier. The Iowas aren't technically even Battleships as their actual guns and AP ammo combination will penetrate their armor belt, resulting in their proper classification being that of an armored cruiser.
To stack the deck with over 3 times the tonnage on the Iowa side, and the vast majority of the Zumwalt's armament disabled on the other effectively concedes that the Zumwalt wins in any realistic conflict.
If 688Is consider their torpedoes threats to 100k ton carriers, some particular reason a ASWless ship would not be in trouble against a
Akula II or the common diesel boats?