Eastercon have released a questionnaire, so if you want a say in the future of that convention now’s your chance.
My main suggestion was to allow the general public into the dealer rooms, possibly even the art rooms. Frankly, I’m a little embarrassed for fandom every time the person on the door turns some curious hotel guest away. As a member, I don’t mind outsiders– it’s the events and panels I’m paying for–and I can’t imagine the dealers themselves don’t want the extra trade. Plus I can’t think of a better gateway drug into fandom than a hall full of cool stuff you can buy.