Duxford has a terrible cross wind, and in years gone by this has been blamed. The state of the runway is dreadful, it is littered with FOD all over from the damage to it which is never or rarely repaired.
It is a great shame as Flying Legends is the only place to see all these beautiful aircraft at once, but thats part of the problem, too many aircraft in the air and on the ground at once without extra vigilant co-ordination.

There is something deeply wrong with the display's setup and co-ordination, 4 deaths and countless accidents resulting in the loss of some very rare aircraft including the Blenhiem, P38, Air Cobra, Hurricane and Spitfire just to name the major ones in the last 15 years shows that actions need to be taken.
I think their future looks very bleek right now and as sad as i am to say it quite rightly so.
Crowd managment is a shambles, you can actually walk around to the back side of the field to watch the display! If ever a plane came down there, there would be major fatalities.
Last year with the 16 spitfires, my life ! It was a stunning sight but take off was like wacky racers, it looked totally un organized. Scary stuff.
Also they push the boundaries in how close they fly to the crowd for sure.