We never saw anyone other than Twilight forgiving Trixie. Perhaps they still hold some grudges, but over time it will fade, and if Trixie appears again it won't be too hard for them to forgive her.
Mr. Sefrol wrote:But as I said, they left little details out like this that would have helped tell how they had to do it this way instead of that way.
Personally, I'd rather see details like that unexplained instead of putting every little things in the episode. It would let fans have freedom to think of how those things happen. Imaginations is always fun. I think of those details like a piece of art. If the artist has to explained everything about the picture, that wouldn't be a very good artist would it?
Speaking of the Scootaloo episode, I want to bring this up.
There were supposed to be 3 Scootaloo episodes spread across the 2 seasons. Scootaloo’s episodes revolved around the idea that she was technically a handicap; she would never be able to fly. They would be about the conflict between her wanting to be like Rainbow Dash and not being able to ever achieve that dream. In the end, she would discover herself and that there is a difference between what you want and what you’re actually good at; your destiny (her cutie mark would have been scooter-related).
This is a few information that Lauren Faust shared in a small interview back then. I think it was dropped for being "too dark". However, seeing the original "dark" story of Trixie got brought back, I would really love to see that happening.