I am really struggling to see the point in the new average system. It pretty much appears that whatever your average was when it came into play is what you'll be stuck with unless you have played a low amount of ranked rounds.
I've never really bothered about mine in the past, I play too often across all courses for me to even contemplate withdrawing from tournaments in order to keep it artificially low. That said it does seem crazy that when I shoot a 29, my average drops 0.02.