As I'm not convinced about the icons, so I thought about a more historical and immersive approach.
IMO Luthier should perfection the radio vectoring to the targets, as it was in reality (both sides, actually Brits achieved it few months before Germans). For instance:
The sector control center gives the usual alarm:
1 - Incoming fighters in M14, 3500 m, hdg 160
2 – Incoming bombers in K17, 4000 m, hdg 180
The player can either select a target, lets say by a keyboard combination as Ctrl + 1, or the sector control center assigns him a target depending on his position.
The sector control center takes then care of vectoring him to the target with more precise and frequent directions, such as:
<Leader, Hornchurch calling, 12+ dorniers coming in over Folkestone, vector 120, angels 25, 12 miles from your position>
I believe that this is what we expected originally from BoB: SoW, and this alone can solve the enemy spotting and avoid the hatred icons. Of course dots and LOD's must be improved as well.
