My suggestions/questions. Forward them to the organisers if you like, be interested to see of they act on them.
1) Why is there no connection to any charity? The real Eroica has a partnership with an Italian charity.
2) Why not use the event to ask for better cycling facilities in the UK, e.g. a petition either online or at the event itself.
3) Is there any intention to include people from the history of UK cycling? This could take the form of a photo exhibition, or perhaps a storytelling session. Maybe someone like William Fotheringham would be willing to give some time for free if he's got a book to promote...
This is a potential example of what could be done: http://thebikeshow.net/
4) Is there a reduction for people who don't need the camping facilities offered?
5) Are you providing mechanical help on the day? If so, will it be done in a way that supoports local bike shops (e.g. invite them to help out on the day, provide training etc)?
I can personally probably only afford to go to one event outside Belgium next year, and if I do it would probably be the Scottish Eroica.