Well, first of all, get rid of all the whiners who think NG is crap, because it ain't, it's just under uncomplete reconstruction.
Maybe, some more sections to the site, I heard people want a literature section or something like that.
Or maybe more rules, like, "where to post". I suggest a special forum section for, different internet cultures. There are many people posting some information that might result uncomfortable for others, especially with this "brony" stuff going around, so why not make a forum for them, that way we don't have to start a flame war.
Also, more mods, that way we can detect trolls and spammers, for an immediate ban.
Well that's my point of view.