My sample size is pretty small but when I've witnessed people (both PMs and engineers) "design through AI" I have seen two flavors:

- aimless AI wandering, leading to pretty, frankly, useless design docs

- using AI to "expand" upon a bullet pointed/shorthanded design doc. To which I feel like saying "the bullet points are already a good design doc!"

I understand that teams sometimes have specific formats that they have to make deliverables for, but having a nice 5 point bulletpoint list turn into 5 paragraphs... all for me to turn the 5 paragraphs back into 5 bullet points in my notes is depressing.

I do think you can get a lot of value in the mechanics, I just have had so much success leaving the thinking to me and the rote stuff to the AI. I'm going to have to think about the design eventually anyways right?