Well I'm sorry I wasn't there for the day, and I wish the rider all the best for a speedy recovery. But reading this thread brings certain thoughts to mind:
First, how windy was it? Those pilons are made to stay put and if they could be blown over then don't you think we would have heard of that happening in the past? Furthermore if it was possible, CTMP would definitely have already found a solution to the problem. So I think it's more likely the rider unfortunately lost control for some other reason.
Second, about the passing, the fastest guys basically just go around you and they're gone. In expert basically you should be comfortable with close passes anywhere on the track, and if some were too close for anyone's comfort the passing rider could have still perceived a lot of buffer between the bikes. But I wasn't there so I'll concede that I don't know who may have been involved. Still, IMO 95% of passing in expert is done clean, albeit sometimes very close.
If we get to stay at the big track, I'm a fan of a graduated system of allowing people to ride it. Don't know how this might happen or if it would be financially possible, but there have been a lot of crashes there lately and I find it hard to blame the track for that.