I'm with DR on this. You can't spoof, deflect, or avoid a 16" armour piercing shell. Missiles are funky, but give me an old battlewagon as part of the taskforce. It's about covering all the bases.
I haven't seen the Gerald Ford class, but will make a note to look them up next chance I get.
Sand: you MIGHT be able to make something that could be launched underwater and fly, but like with STOVL aircraft the result would be sub-optimal compared with vanilla planes and carriers. On the other hand carriers are massive missile magnets, so putting them underwater could be cool.