I read that PF3 stops aircraft that are 400 mt from you in a 90 degree area left/right of your airplane. I have noticed that when you are holding short especially long holds being number 2,3,.. like in Gatwick Runway 08R for take off, you can see on your left window the AI behind you stopped way too far from you, I guess this is PF3 stopping them because they are within the 90 degree boundary area but it looks very very weird or unrealistic.
My suggestion is to reduce this 400 mt control area to lets say 60 degrees from airplane axis which is great, and for the remaining 240 degrees make it something like 70 mt . This way you still stop aircraft that will be on your way but let the other ones following you get closer in a more realistic way.
what do you think?