Ian, Instead of reinventing the site, leave it for another 12 months, only doing minor tweeks as required and concentrate on developing the store as a source of income for yourself and your family. The site may be stagnant as you say (not growing fast enough with new users, but have you considered that because of the market you have, membership will slow down as you reach semi saturation point. The numbers, without going global, are finite and the membership of this site is huge. A return to the chaos of yesteryear is something no one wants. Maybe, as you pointed out before, a small management committee, with yourself having the golden vote may be the way to go. (3 plus yourself maybe?) Give yourself more time for yourself and your family.
I think the development of the shop (in all its categories) may also be the way to go for yourself.
I agree, the politicking, and the empire building, is tiring and does tend to leave the enthusiasm in its wake but I think those on this site are more interested in the "just flying, not bulldust" info and discussion this site is known for.
Thank you for your enthusiasm and hard work over the years.
My hand is up as always if needed
Take care.