I asked this exact question once when bradfitz was giving a talk about Go at AirBnB. The answer was that the team is led by minimalists who are interested in keeping it lean and avoiding bloat and especially in avoiding it becoming C++. In fact, you can see his answer about Go 2.0 roadmap plans (where the answer is basically "too soon to think about that yet") followed by my question (at 54:50) of this talk:
http://www.youtube.com/watch?feature=player_detailpage&v...
I guess the question then is "do you trust those guys?" So far the answer seems to be yes.