I would say by default, the AI aesthetic is the opposite of utilitarian. It adds so much unnecessary bits and bobs everywhere, random things that look reasonable at first glance but often are nonsensical noise. The visual equivalent of the endless yapping in chat.

For me it was a lot of work with Fable to keep it focused on producing a minimal, medium-high information density system. Sure, it works very well if you are just IP laundering another product, less so for more niche applications. Still super useful, but I haven't seen it produce much "intentional" design on its own.

I’ve noticed much the same thing. Adding rules for ruthless minimalism and no anticipatory features helps, if context hasn’t degraded too far. Still, I tend to ask it to remove cruft much more often than I ask it to add new UI.