Was the attack category invented to help scoring? It seems to me that ATTACK is merely the "gray area" where AH attorney types can work the system without really commiting to anything 
If there wasn't an attack category a lot of fighter pilots who don't care about bombing defenseless GV's and toolsheds would suddenly look like they suck.
I do think all attack/fighters should default to attack when ord is strapped on and default to fighter when there's none.
As to the original thread no F3 in the IL2 (or A20) means no way to see behind you. And isn't the A20 an attack plane? It's got F3 enabled.