I have seen people saying "the ending was sad but perfect". But for me it is definitely not that. There are two ways in which the wiping out of the Good Omens universe and creating a new one could be interpreted:
(1) The new universe is our universe. [This was confirmed as a correct interpretation.] But all the major points in history are the same. You know, world wars, COVID, et cetera. Even Christianity is here, just without the God it is aimed at. This falls really flat. How is it possible that history repeats itself so nicely and accurately? We were supposed to finally have free will, yet almost all human decisions have to be the same in order to keep the timeline essentially unaltered. So... maybe there was no problem with free will after all?
(2) Well, okay then. Maybe this is a completely different universe, not ours, but a better one. A better one! Good job, my ineffable boys! But... Good Omens universe was a satire of our universe. This would suggest that the takeaway is that our world is not salvageable. It can only be destroyed. What is meaningful (or clever or beautiful) about a message like this?
The only way I can imagine it working is by putting aside the whole problem of free will and instead making Heaven and Hell always seek destruction. Then just do the Adam trick of altering reality so that everything is basically the same, but without angels and demons. You get my point.
Such an ending would still have issues, of course. Meddling with reality and time travel always do. But these are things one can look past, minor issues. It is fiction after all.
If people in the new universe are still making the same exact choices they made in the old universe (crusades, spanish inquisition etc.), then the old universe didn't have a problem of free will. S3 missed the point that humans being worse than hell was the whole joke of the book. Humans didn't need to be swayed with temptation: they already had free will and used it freely lol. Heaven and Hell were dumb corporate who thought they were doing a good job at swaying humanity but in reality they didn't sway shit. That was the whole point of the satire of the book, it's incredible that s3 missed all that and some more.

























