HNY, folks. Up at 6am, trying to channel all my energies into finally finding a narrative arc for a key character I've been struggling with in my WIP. Was thinking of going with an omniscient narration for him. It's an approach I've avoided thus far - it always seems a bit of a cheat to have the narrator know everything, even the future. It's something that's bugged me with Stephen King's work. Things like 'so and so smiled. But tomorrow they'd be dead.'
In my case, a more tempered approach might work, especially given this perspective is introduced near the end of book 2, to perhaps give readers some world-building reveals that they've been keen for; my regular narration style is pretty much the voice of the reader, so they only know as much as we do.
Anyway, I thought I'd try to gauge people's thoughts on the pros and cons of omniscient narration.
If the entire story is in the past tense, surely none of it is in the future? If I tell you a story about what happened to me last year but include a reference to last month, it's not that I know the future, it's that it's all the past.
But I think you've highlighted one of the big problems with omniscient with what I bolded.
To quote Le Guin:
"it’s also the most versatile, flexible, and complex of the points of view—and probably, at this point, the most difficult for the writer."
The pro of omniscient is you can do just about everything.
The con of omniscient is you can do just about everything... including stuff readers hate.
Everyone I've heard talk about the bolded dislikes it (okay, all three).
I don't think I've heard anyone complain specifically about what you're talking about doing - using omniscient to give extra worldbuilding details - but I've read lots and lots of complaints and reading advice that are either in the neighbourhood or related. If the worldbuilding details don't happen in the character's PoV are they important? And if they're not important, then should they be in the book?
Or to use another example - one of the big strengths of omniscient is that you can switch PoV a lot quickly... which is also regularly complained about by readers.
I guess one possible metaphor is it's like a cooking competition where one person can go to a supermarket, and one person can get absolutely any raw ingredient but only raw ingredients.
Person One - Limited Third, First Person - can do a hell of a lot, and has a lot of awesome pre-formed options, but there's some things they can't do because they're not stock.
Person Two, the omniscient, can do absolutely everything but there's so many more options and choices and tasks to do. Person Two wants pasta? They've got to make it themselves. Which is the best form of pasta if you get it right... and the worst form if you get it wrong. And Person Two has a lot more chances to get things wrong.
So there it is. The pro is the con and the con is the pro in my book.