At its heart, I am not certain the increased contributions are always good. There is a lot of theory written about how to build and grow out languages, and most of it seems to indicate that there needs to be a strong, central group of people with veto power. So long as the Go internal team retains this power, it's good, but having a community driving development for itself outside of the core language team often leads to (a) too many cooks in the kitchen and (b) adding features vocal fans want that nobody else cares about.