OW that latest report appears to be an update based on publicly...

OW that latest report appears to be an update based on publicly available material. They don't appear to have interviewed the company directly. (I might be wrong)
As I understand it, the initial resource calculation was based on assumed flows of 2mmcft/day which as you say T-1 did not achieve on a sustained basis.
Given the nature of this play is new in Australia much of the modelling may have to be derived from offshore experience, notably the USA.
From what I have read Breakaway are correct is stating future wells ought to have better profiles as this has been the case in America. Decline rates I have found harder to get information on but well lives at commercial levels appear to have a decent life expectancy....8 years +.
I guess we'll just have to carry on what we have become proficient at......wait and see.