I've enjoyed all the meetings that I've done with them. Even though I don't own one now.
After doing the last national at chesterfield, I did think that the track was more of a 'time trial' type thing, and that it didn't lead to a great deal of 'proper' wheel to wheel racing.
The main reason being that there were too many features.
I know that with the space available you can go mad and put loads of stuff in there, but I found that the back straight was the only place where there wasn't any obstacles. There was a jump of some sort either on every corner or in between every corner.
It is nice to just go and race wheel to wheel as well as do some jumpin.
Obviously you don't want TC tracks, but some places to race on the track would be nicer.
You look at a 10th track and they tend not to too have many features, so you can race against people without landing on them just because they've turned into the corner after the jump and you take the jump longer.