I was going to quote and specifically deal with parts of your post, but I think that perhaps it'll be easier if I just post a different view on things.
I for one am glad to finally see some positive action being taken to consolidate our fireground practices.
Over the past few years I have on many occasions seen PPV fans in use at CFS incidents. This has been over a number of groups, with a number of different brigades. The vast majority of the time, the fans have been used incorrectly, either leading to a significant increase in fire behaviour, or a severe contamination of the area they are trying to "ventilate". It is obvious that the CFS need to develop a Tac Vent package, and as you are obviously aware, this is/has been done, but is still facing a number of hurdles.
Now, from my experience with Positive Pressure Attack, it requires a very switched on, and highly trained crew to implement in a safe and efficient manner. If your brigade happens to have this, then more power to you. Frankly I'd love to see the material you teach and instruct. PM? Anyhow, I believe that broadly the CFS as a whole does not possess this, and as a risk minimisation strategy, have produced this ops bulletin.
It should perhaps be pointed out that there are also a number of career fire & rescue agencies in the country that have very similar thoughts on the topic. Now, with this and their training budget/instructors/materials/research/facilities in mind, if they struggle to train their crews to a level of competence that they believe is adequate to use PPA on the fireground, how on earth can CFS come close when we don't even teach basic ventilation anymore?
We, as a service, are struggling to reach every CABA operator and teach them the basics of structural fire behaviour. We also struggle to use PPV fans correctly for the simple task of post fire ventilation. PPA requires a high level of knowledge, understanding and recognition of structural fire behaviour and a higher level of knowledge of use of PPV fans, as well as reading the burning regime and vent profile of a building. If we cannot achieve basic competence in any of these areas, how can it be safe to allow the service to utilise a practice that requires a HIGH level of competence?
I understand that you may have a very well drilled and instructed brigade, but perhaps its best to think outside of your patch and look at the service? We need to hone our basic skills and understanding rather than try to implement ideas that are not officially endorsed or instructed and can be VERY dangerous.
I don't think some people realise just how close we have come to some major extreme fire behaviour events, and so far it has merely been luck that nothing has happened.