The one that I hear the most is to have 18th Street open to only pedestrians, at least on designated days, like they're doing in Manhattan, for one.
Another request is coworking alternatives to Tryst. Left Bank and Bossa both have owner-approved crowdsourcing efforts (Left Bank, Bossa) to open during the day and accommodate daytime workers if we provide evidence of a customer base.
Decrease the amount of crime on the weekends. I live in Kalorama and I love it there, but I don't like Adams Morgan on the weekends. I think closing the street on the weekends for a start would be good. To give it a more festival feeling.