Deez, I think the icons are a necessity for people to play games that intend to simulate the real world environment. First, I was also an enthusiastic no-icon advocate, especially spending many hours with no-icons in the CT.
No icon setting strengthens a truly thrilling and intensive gameplay and yet, AH graphics is too severely limited to give satisfactory results to people. After a few weeks of no-icon play, I could actually feel my eyes getting tired because of the increased stress they were under - it is undeniable that the quality of AH visuals is lacking very much compared to real life, and thus it requires excessive attention and concentration, straining, squinting for many people. I use a 19 inch monitor at 1280x960 resolution for playing IL-2, a game with absolutely superior graphics compared to AH.. and yet, even in IL-2 spotting planes can be a real pain.
Therefore, I think the icons themselves are the absolute limit as far as compromises go.
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However, some points are valid. While icons themselves are a necessity, there's no need for it to stay the way it is. There can be many suggestions, variations and great ideas to how the icons should function.
Also, the "laser range finder" in AH has a tendency to promote long range shots over 'realistic ranges' so frequently mentioned. Some people argue we are all better in gunnery than WWII pilots, but I think it owes more to the fact that people can always confirm too easily whether their shots will land or not. They see the icon, read the numbers... "ah.. 600 yards.. a long burst of my Hispanos probably will ping him once or twice!".... "hmm.. 700~800 yards.. I'd better save ammo..."
Also, identification is all too easy, and as so frequently mentioned in the perk plane threads. With a crude scale of 1 yard = 1 meter, 6.0k range is 6000 meters, 18,000 feet away. I know some pilots have very good eye sight and can spot planes incredibly far away.. but I doubt anybody can tell the difference between a Spitfire and a Bf109 at 18,000 feet. "Spotting" and "identifying" doesn't necessarily come simulataneously. This makes life very hard for people in perk planes short of Tempests or 262.. they have to fly as timid as they can to actually survive and land good scores. Once you are spotted in a weak position scores of fighters will chase you around spraying like mad.
Thus.. I think there are some good reasons and necessities towards modifications on existing icons. A few changes here and there might call for a whole new ball game...