Related from many itinerations ago, but I've never mentioned it because is cumbersome and difficult to reproduce (And I know TonyE does not use autoformation patrols):
1.- Not programmed patrols in ship formations, usually extra ASW patrols too near and in too small formation sector near the formation nucleus. Also with helicopters in Assault loadouts (as AEW patrols), not present if loadouts are previously changed in the scenario Editor to Ferry or Cargo.
2.- Autopatrols shoot down, both human player but mostly IA, are not repeated, or repeated after a very very very long interval, but obviously in both cases the sides have available helos or airplanes to reproduce instantly the patrols (Clearly at the scenarios begins).