But in case anyone still thinks Derpy is not coming back: this is the third time in season 2 she's not appearing, the other two times being episodes 12 and 16. I assume she's just not meant to appear in every single episode, and as the animators didn't edit her out of s02ep18 and 19 (even though they probably would have had time left for such a "pressing" issue), I don't think her absence in "It's About Time" means she has been completely abandoned. As far as I know, Studio B has already stated that they won't kill Derpy off, so no need to fret.
But in case anyone still thinks Derpy is not coming back: this is the third time in season 2 she's not appearing, the other two times being episodes 12 and 16. I assume she's just not meant to appear in every single episode, and as the animators didn't edit her out of s02ep18 and 19 (even though they probably would have had time left for such a "pressing" issue), I don't think her absence in "It's About Time" means she has been completely abandoned. As far as I know, Studio B has already stated that they won't kill Derpy off, so no need to fret.
Everyone's happy.