One thing I've noticed with AI posters is that they're all "flat" in terms of attention. For whatever reason, they result in a post where every part is on the same level visually, and your eye does not get drawn to anything. You can't immediately see what is and isn't important.
The bad posters are absolute disasters in this regard. (And completely irredeemable in general! They are not "OK" in any way.)
But the better-stylized examples in the article aren't much better! Most of them have the same tendency. Only the minimalist Japanese and 40s Cubist styles do much better, and even those aren't structured amazingly. If you tried to add more information, I bet even the minimalist styles would become a flat and confusing.
This is the same problem I have with stock Claude prose and code. It's verbose, sure, but worse is that there's no quick way to tell what is and isn't important. In good code, you can understand the shape of the code at a glance; AI code is pretty much the opposite of that. And so are AI posters.