All of us who have been BB for a while know which AAS do what, but GH15 was never as specific in his advice as you were closeline. If he had said what you just did then fine, that is what we expect who know. But he did'nt, there was never any heavy emphasis on tren 5 years ago. I also remember he spoke about dbol being the best AAS ever made but you rarely hear anything about that these days.
If has said "well I decided to be more specific in my recomendations 1-2 years ago" then at least we have a notion of why the change occured.
I have no problem accepting a change in view but there has to be a plausible reason and until gh comes up with an explanation it wil just serve as a reason to uncertainty. To be able to really understand things there should allways be a plausible explanation, you can't just say "change" without elaborating or just say " as a bodybuilder you should know", I just explained that he needs to clarify like you just clarified why you change.