Interesting reading this, I don't race at your club, but do run a club now and also been involved in quite a few over the past years. The thing that has changed enormously in only the last few years in tenth is lipo and brushless, not that long ago it was much harder to get a car to go seriously fast and last 5min, but now anyone can get a 4wd to go at speeds that tbh a tenth car just can't handle, add to this mini pins and carpet and an enclosed space and things are going to happen!
Now in the world of 8th we have had to consider marshal safety when building tracks, most of all the jump sections for quite some time.This is something 10th is going to have to consider more now the cars are getting faster, i have raced at some indoor meetings in the last couple of years that give no consideration to marshals at all, and in many cases marshals are under attack from many directions with nothing but a chair for cover
I think the problem you had is quite simple, the jump was in the wrong place!
I think I kinda aree with richard also, If things are getting to fast, slow the track down,polished floor, ripple sections etc, make people slow down.But having run clubs this I realise this comes with a problem, most racers only enjoy their meeting if they can go flat out all the time, if you make them slacken the slipper off, change the profile, or even need to reach in the box for a far slower motor they don't come racing anymore!