1. Represent and Promote - already tons of airsoft content on social media and youtube
2. Regulate and Enhance - sort of perpetuated by field owners (game rules and so on) and perhaps insurance
3. Organise and Facilitate - anyone can organise any event
I might argue that 3, leads to a shocking inconsistency of 2, and if you want kickingmustangs that's how you get kickingmustangs acting as 1.
A central body to publish a standard ruleset, meaning you can rock up on site and know exactly what the rules are, how they will be enforced and what to expect if they're broken (ie not just nothing as is so often the case) is badly needed.
A central body to provide training, on things like the dark and mysterious art of knowing what the numbers on a chronograph mean is needed, because that information being easily and freely available evidently isn't enough.
A central body to amplify, or denounce, the pr that puts our hobby in the spotlight as required. Do we really want non airsofters impressions of the sport being "airsoft cheetar destroyed by 500fps sniper shot to the balls [instant karma] [super painful] [he regretted it]" or "airsoft fights and flipouts compilation #2756". At best we get people showing up for their first gameday thinking that's an acceptable way to behave, at worst it gives the fun police all the ammo they could ever want.
We need to remember that for many people in the uk guns are bad, and unless you're a soldier, an actor or a videogame sprite you have no business even touching a gun shaped object let alone actually be allowed to roam free with one.
Of course it's pie in the sky thinking to some extent, but then i suppose it might be as alien as the early days of other sports where regulation didn't seem necessary.