Recently saw an airspace presentation by Mike Smith. Everything he said was very reasonable and had merit. A few of the people at the presentation brought up a few good points, but the general idea I think is that its up to the pilot to use his/her head as to what the situation warrants (ie, radio calls, manouvers etc).
The major concern was that people are talking too much on the radio, and its true. We all hear quite a few people talk on the radio trying to organise their own separation when there is no separation conflict at all. Mind you, there are absolutely times when that is required, but not very often.
My 2 cents