I was rethinking the bookshop meta I wrote a while ago and realized I was not thinking big enough.
The bookshop has always been Aziraphale's version of Crowley's plants (his trauma reenactment), but also, absolutely everything Aziraphale does in Season 2 is a re-creation of Heaven's role. Crowley's behavior also encompasses everything, not just his plants.
I've seen it suggested that centering Aziraphale and Crowley's trauma histories is reducing their characters to behaving like just reactive victims instead of survivors with agency. Or worse, it's "excusing bad behavior." I don't agree with either of these, because I feel that part of Good Omens is about how large, powerful systems affect individuals, and so the context of every character's decisions matters a lot to the overall themes of the story. Everyone starts out working within a system they believe to reflect reality and then has to learn how to break free of it. You cannot really illustrate that without having the characters start out being genuinely trapped with different ways of coping with their reality.
This is an attempt at a pretty big-picture meta. Although it isn't a plot prediction, it's how I think some of the series' themes are going to progress. It starts out perhaps a little grim, but in the long run, it's how Aziraphale's character growth and relationship with Crowley can simultaneously be massive for them as individuals, a crucial part of the overarching narrative message of the series, and symbolic of a change in all of Heaven and Hell, all while allowing the themes to continue to prioritize human free will.
In short, it's about Aziraphale's problems, but it's also meant to be an Aziraphale love post.
All of the below exists in tandem with Good Omens as a comedy of errors. Just because there are heavy ideas does not mean they will not also be funny. Look back on how much of Season 2 seemed silly until we started to pick it apart! One of the amazing things about Good Omens is how it manages to do both silly and serious at once! (I feel like that's maybe a little Terry Pratchett DNA showing through. "Laughter can get through the keyhole while seriousness is still hammering on the door," as Terry himself said.)