Wasn't WWII ship borne radar "surface radar"?
I know that they were able to detect threats from the air but didn't they have the capability of detecting ships at sea? If so, then further neutering the CV's dar would be a step in the wrong way. There's a good argument for modifying it so that from the ships you can see low alt cons incomming and the enemys CV if it's within range. I don't know if having 2 radar settings is possible in AH but if not then some concessions for gameplay is justified IMO.