Now THAT's an interesting word.
I would very much like to see an official stabilised approach concept, as set forth by a regulator. I honestly have never seen one, that might be bad on my part, but is there really such a thing?
I've looked a bit into your FSF link, and I think what is said there makes good sense, and I'm not disagreeing with you on the fact that thrust/min.power setting should be a factor, my bad for forgetting to include that.
However it is my understanding that the FSF is no more "official" than you or me or anyone else -- they have more credibility for sure, but that doesn't make it official.
My two cents are still that whatever stabilised concept your company/operator has determined in it's ops manual, is approved by the appropriate authority, is the only thing valid for you. And it will vary from operator to operator.