
With a bit to put in before I unchain the queen of the salt flats to answer, remember that this is Oscar’s story more than Sam and Dean’s. He’s been waiting over a decade to tell his tale, and it was purposely edited to have his part after the bros. Those two parts were written in tandem by the two of us.
Taking one chapter to fill in the background isn’t asking a lot when it comes to character development, especially when two chapters post a week.
And now enjoy the unedited answer from neon:
Neon here, AKA the person who wrote the new, not-going-anywhere Oscar’s POV chapter of the story ( Deviantart | AO3 | Fanfiction ). Hi. Howareya.
There’s so many things to unravel here about this ask, and to be perfectly honest (and trim out some of my initial knee-jerk reaction to it), it leaves a very bad taste in my mouth. I understand that it may not have been intended to be as rude as it turned out to be, internet etc. tone and voice etc. etc. It’s wonderful that you’re so excited for the next chapter! But there are ways to word things in a respectful manner that doesn’t stomp all over someone’s hard work, and I urge you to remember this next time.
There is a difference between “not moving the immediate timeline forward” and “not going anywhere.” Stories don’t need to be all linear, and in fact literature might have died a very boring and unassuming death long ago had they all been restricted to that style. Catching the reader up on another side of an event is one of the older tricks in the book. So, my second bit of free advice is to find your chill and try to enjoy the ride.
Next up, this story is not in any rush to the finish line. It’s clearly a character driven piece. Never was promised to be anything else; the whole AU is more character driven. Just look at the original story; there was never a deadline for its (fantastically tragic, if I may brag on our storytelling for a moment) ending. It came when it was time.
So, as someone who is very proud of how far my character and the characters of my writing partner have come after years of waiting (in-story AND in real life), I have to say nope, nada, never, to this ask. If you’re not here for Oscar’s development alongside the others, then ….

Look. You hurt his feelings.