CVs and Aircraft need major upgrades.
Escorting Bombers, or other planes should be established (similar to escorting surface ships).
Waypoints - Ability to send aircraft to way points, change direction, altitude, etc, to waypoint2, waypoint3, etc.
Altitude changes - Ability to climb/descend at great rates.
Speed changes (more fuel), drop tanks, temporary sonor-buoys in lieu of mines for scouts,
Sight range changes based upon altitude - not plane type. Low altitude planes, except TB, would have 55-80% less sight radius vision.
Better audio feedback from planes:
"Fighter Squadron 1: Low on fuel/ammo" "Bomber Squadron 4" Mayday! Mayday!", Fighter Squadron 2: Engaging Enemy Bombers/Scout/Fighters", etc. Essentially anounce which squadron is communicating what message, not just generic "mayday, mayda" and then you have to go hunt your squadrons to see what was shot down.
Fighters Strafing enemy ships with guns.
Fighters could carry rocket pods (short range) and 20MM cannons (they actually did).
Bombers should be able to carry a/b locker bombs.
Type 3 bombers, including multi-bomb and rear gunners for protection, but slower.
And CVs should have the cancel button (unload fuel or dump planes); better control panel.
...and the list goes on.