CIWS on this thing would just turn it to a big pile of incoming kenetic energy.
Might couple the damage better than a conventional WH.
Hard to get WH fuzed right at that speed, and probably a nearly level impact angle.
You don’t take out the missile you go after the delivery system before it launches.
It would be a big cloud of rapidly decelerating kinetic energy that would be small enough for shipboard armor to withstand. Or it could simply deflect it into the ocean assuming it’s a sea-skimmer. Point is, CIWS has a better chance of stopping it than C-RAM does and it can try to stop more missiles than the C-RAM system we idiotically replaced the Phalanxes with.