I like it more for the extended stats being kept in a central repository, but you do also get a comprehensive draft guide as a subscriber.
If they put out more Kings content and did a better job making it easy to find, I'd probably make more use of their other content. I only saw this one because Hoven saw the above tweet and thought I'd like to read more on Ziemmer.
The content itself is a mixed bag. The Ziemmer article is comprehensive. Videos, still shots, and a deep dive into a variety of tools. When I was looking for stuff on Brady Cleveland while prepping for the draft, it was a short interview with comparatively little substance. Your mileage will definitely vary.
I haven't subscribed to the Athletic in over a year though. I'd take EP over it.