I'm a bit late on this one, but I thought I would stick my twopence worth in!
How about a "Commentator Free Zone"
You could remove some of the tannoys at the far end on the main runway, giving people the option to watch the show without the PA.
Generally the commentators at OW get it just right, keeping quiet as the aircraft pass, but it would be nice to have the option to not hear them.
Also how about flying the Hind at the beginning, in the middle and at the end of every show - I just can't see and hear too much of that beauty.
Apart from that, there is no other airfield around the world ( and I've been to a few!) that I would rather watch an air display at.