I've noticed a few standing here and there. Most of it is probably due to some odd navmeshing. ICAIO does a lot of navmeshing to fix some of that, which is where a lot of it's incompatibilities stem from. AIO uses a lighter hand with its edits.
Now that I've had some time to play this release in a proper playthrough I feel I can give some better feedback on the switch to AI Overhaul.
When it works, it works great. I'm seeing NPCs using animations I've never seen them use before, going places they've never been before, and having conversations with dialogue I've never heard before (or at least didn't hear while using ICAIO, perhaps because certain characters never/rarely met with ICAIO's changes). Overall it makes towns feel more alive and its citizens more realistic.
All that said, it sometimes just doesn't work. Quite frequently I'll find NPCs standing with their faces against some wall or stuck in some weird place staring into space. Occasionally this seems to break some of the scripted dialogues in the game, such as world encounters where you find NPCs engaged in conversation that then abruptly stops (presumably because one NPC is stuck).
Overall I'd say the positive changes of this mod outweigh the occasional issues, especially considering ICAIO had its share of quirks too. As to which mod is better, there are quite a few things I liked in ICAIO that this mod doesn't have, but there are also a lot of nice things in AI Overhaul that ICAIO didn't have. In my opinion both mods are great but AI Overhaul is the winner just because of the added compatibility.