To be honest, I wouldn't bother with the twin medium guns, waste of deck space for something escorts can do just ass if not better. Also the cut-outs of the flight deck could be remedied by putting the AA guns of a "balcony" just under the deck, as what you have now looks like a British carrier
Essex and her ilk would beg to differ, for what it's worth.
Whether or not it's something one would choose to add, it's certainly justifiable.