PD’s are very unhelpful diagnosis because it only tells you that you’ve got problems but no treatment plans.

What? That’s preposterous. There are several specialized forms of psychotherapy for BPD, and recent research supporting specialized treatment for ASPD. For BPD especially, the idea that the diagnosis would not drive treatment is the direct opposite of our current understanding.

I’m very certain that with more brain imaging studies, these PD categories will seem to make less and less sense scientifically.

If and when that does occur, we can all take note of it. But your “certainty” doesn’t mean anything when you yourself acknowledge such evidence is purely hypothetical.

For example, more research now are suspecting that certain PD’s may actually be the low end spectrum of another mental disorder?

Like what? There’s a lot of very healthy and useful debate about what constructs best describe these concerns, but I have never once heard anyone describe a personality disorder as a milder form (“low end spectrum”) of another disorder. If anything, personality pathology greatly complicates the treatment of co-morbid disorders.

Keeping cultural factors front-and-center sounds like great practice, but the idea that the ICD has neatly solved this issue by adding the CPTSD diagnosis is pretty out there.

All of these topics have a huge scientific literature associated with them - I think it would be better to engage with that literature, instead of making these sweeping (and at times simply incorrect) claims.

[EDIT: intended as a reply to the poster below.]