I just finished reading the thing yesterday, and I was pretty disappointed with the ending. In my head I imagined some stuff that would make sense, and it would fit nicely into the context of the story. It would also end up with Littlepip being reunited with her friends, and it would be a much happier ending than what it really is. It would start at the part when Celestia talks with Littlepip and opens the portal back for her. Littlepip would go through it instead of using the SPP maneframe and falling into a coma.
I'm not completely confident in my abilities, but I'm pretty sure I could do something similar to the original writer's style.
Now, the actual problems:
1. Is there already a thing like this? I can't possibly be the first one to come up with this, but I browsed through most of the side stories and none of the titles suggest such a thing already exists. I need some confirmation of it not/existing so I can be sure.
2, Most Fallout Equestria side stories failed horribly other than Project Horizons. I'm kind of wondering if anyone would even read this if I wrote it. Hell, people don't even read this thread.