This may be an age old argument, but I still believe starting times is one of the biggest issue that keeps Freemasonry from increasing its current numbers and broadening the appeal of the order. Starting at 6pm to allow younger and working brothers to attend should provide a strong boost to numbers. While this will not be suitable for all lodges that does not mean that some lodges can not adapt and then act as a gateway into the order. Finding various points where one can shave off a little bit of time without losing much is not a hardship, for instance limiting wine takings and speeches can shorten a festive board.
I'd be interested to hear from people who have taken steps within their lodge and if they have seen any impact.