Yeah, I don't mind editing Mr. or Dr. or Mrs. to expand them, (or other abbreviations that sound better when expanded.)
But editing the text this extensively for "…" or "—" is not really something I would like either. (although easy with a global search and replace) I just don't want to modify the book that much.
[for example: David Gerrold's
"Deathbeast" has ~70k words, and uses "—"
1736 times, and "…" almost
200 times.]
I did do some looking at Piper and found its github. A request to fix "…" to turn it into a pause instead of skipping it is listed about 7 months ago and another of the same request a few months before that.
On the other hand, its hard to say for sure, but as far as I can tell, it doesn't look like a lot work has been done on Piper since its last release in Nov 2023.
I don't know if the developer of it is still working on it.