CV ship/plane control
There should be an easy UI mechanism so that player can differentiate between ship and plane directional controls. This happens when 1 or more sorties from a previously selected group of planes has been destroyed, but the player continues to maneuver them. The game AI reverts to ship control if the plane group is no longer available. In almost every game, a CV driver mistakenly commands his ship to charge the enemy when he in fact though he was directing his planes. We have all done it. Sometimes we correct it in time, but often the CV is sunk and game becomes unbalanced for no legitimate reason.
CV drivers already have a lot to think about.
Perhaps the control algorithm should disable ship command in cases where the most recent selected group has been been one or more plane units. The player would have to explicitely click on ship to reactivate ship controls.
Also, there could be a ship or plane icon that gets highlighted to indicate which type of unit being controlled.