Would it be possible to have an option for the plugin to split either as New Book Per X Sections (where for every X selected sections, create a new book using the TOC entry of the first such section), or New Book Per TOC Entry (where the latter would include in the resulting book any selected sections after the given TOC entry that don't themselves have a TOC entry)? I prefer to always split anthologies so I can read and rate the individual stories/essays, but for ones where the creator didn't do one-section-per-story, it can often take a VERY long time to manually select the sections each story and split them out one at a time.
eg
https://www.goodreads.com/book/show/28503846 has 105 stories in it, but each one is two sections, so a "split every X" option set to 2 would make splitting that behemoth a breeze. Meanwhile,
https://www.goodreads.com/book/show/8146 has 67 stories in it, some of which are 1 section but others of which range from 2-10 sections (only the first of which ever has a TOC entry), so splitting that easily would require assuming that all of the blank TOC entries belong to the preceding entry.