Sounds like it was a fun weekend! Haven't read the whole thread but would agree that it would be better if some trails were closed to let them recover after a severe beating.
The folks that volunteer and maintain the trails at Swinley do a great job and should be applauded, if only they'd be given more support from the Crown Estate.
As for not holding events there, a few races per year are good for the sport and the general profile of MTB in my opinion. The thing I object to is half the forest being closed for months at a time so Warner Bros can film 10 minutes of footage! I brought this up to a security guard a couple of months ago when he stopped a group of us cutting across to the MTB area and he pointed out that Warner Bros probably paid more than £17 – fair point!!!!