Maybe I'm just not mature enough to understand the ending of this. If we had to write a moral for this story, would it be "we gotta move on"? Maybe?

It felt like the novel was rushed, that the author was just tired and didn't want to keep track of all of the characters anymore.

I'm not sure that I enjoyed this series. At any rate, I was happy to have finished this series.
Future Pony, if there are any more stories in this particular series, about their children or no, do not read it.