WASTID
Striker
Open air venues are all down to sound quality so venue itself can't be blamed. Stands at Twickenham are steeper than Wembley therefore you'd expect it to be better as you're closer for a view. That was definitely the case for sport.
I'm far from an expert on sound and acoustics, but in some venues I have been to I don't think it was sound quality that was the issue! There's a reason some venues are purpose built for music.
I've been in parts of Hampden where echoing was bad, yet non existent in other parts and the same at Wembley Stadium as well. Just heard before that Twickenham isn't great for gigs.
Anyway, I've decided a weekend in Amsterdam is more appealing that London irrespective of acoustics.