Full disclosure: I've yet to run this, so I might change my rating/review once I've gotten into it a bit. This is based on a thorough read of chapter 1, a session 0, plus a healthy skim of chapters 2 and 3.
There's a lot to love about OoA so far and I'm incredibly excited to run it; I think it's got a very fun set-up and takes you through a variety of exciting and wild scenarios. However, if I were to sum up my gripes in a word, I'd say: sloppy.
There's almost no elaboration on the city itself (as in, some entire districts have maybe a sentence worth of description across the text, and you're completely stranded the moment a player asks to go off the trail of the encounters), and for an AP placing the characters in the roles of lawbreakers, it sure would be nice if there was even a paragraph dedicated to suggesting what might happen if they get caught. Mana storms are entirely handwaved as a concept.
Some encounters fall into tired tropes that I thought Paizo was over (I'm looking at you, tribe of murder gnolls whose entire existence is dedicated to murdering for fun) while others are oddly cartoony. There's a whole chunk of a scenario in chapter 2 involving a bridge that makes no physical or logical sense whatsoever. There's a part in chapter 1 where it asks you to give characters a condition that only exists in 1e if they do something stupid.
At the end of the day, none of this is unfixable, but in my opinion a pre-written adventure should do more than this does to minimise the homework the GM has to do to run it. Again, though, I still love it conceptually and I'll make sure to amend my review if anything changes in how I feel about it.