Touching on the CIWS aspect, a Goalkeeper would indeed be good to deal with fast boats but against sea skimming missiles a 1000 yard engagement distance risks the 'destroyed' missile debris creating a shotgun effect on the target. Kevlar armour, if he is right, would seem a sensible and complimentary option.
On medium range defence, he may be suggesting that the CVS, like the Invincible class had, should have a SAM capability given the shortage of destroyer escorts. This would be a particular British need as the USN has a sufficiency of escorts.