I am noobie have only autocrossed at St. Andrews so I don't know any better, but why are people hating on that location? Is it because of the poor pavement quality?
Besides the lack of shade (which I must admit was unbearable this past weekend) I like the fact that its in an open field. Coming out the first time it was comforting that even if I screw up I ll drive into the grass and not hit a curb or a light post. If it was in a parking lot I would be much more hesitant to take out my car for the first time.
I also appreciate how friendly, patient and helpful everyone is towards new people, this was definitely a highlight for me when I came out for the first time last summer. This is a great thing we got going on and my respect goes towards all the organizers and instructors who work hard to make this happen.
Sorry I don't really have any suggestions on improvements, but wanted to give my 2 cents as someone who recently tried AutoX