ORIGINAL: FatR
Simple cost comparison of ships to aicraft is deceptive. First, for aircraft you need pilots. As attacks against the Allied fleet in 1945, result in 20-30% losses from flak alone, pilots inevitably will be a bottleneck. Of course, you can use kamikazes, which hit even with miserable skills, but kamikaze have their own limitations, like apparently reduced damage compared to just bombing the target. Second, your air effort is also limited by airbases and support, unless we talk about the battle for Home Islands, and possibly even then. Third, even an inferior surface force can disrupt a landing, or cause an amphibious TF to delay/retreat, if it gets lucky, possibly buying you crucial time. I see no reason to turn off most of naval production until Home Islands are cut off from DEI.
interesting comment about Kamis causing less damage than just bombing a target. Where do you get that from? Are we talking about a bug, design or is that just your impression? [&:]

