Off the top of my head so could be lying but another good "unique selling point" in my opinion could be to be shown round on the day at a predetermined speed by an ACC rider - if they dont want to be then they dont have to be done so but could be an option on entry form?
For some of the sportive/reliabilities I would quite like this as you know you wont get lost and will make it round in 'x' time (provided you can keep up !!)
Just need half a dozen ACC riders to commit to riding the route at a predetermined ace
Locky