Hi JimmXinu. I've split up a number of omnibuses with your plugin. I like it a lot!
There is one thing EpubSplit isn't so good at though, because each split has to be done one by one: splitting up large collections of short stories.
There's several reasons why splitting short story collections into individual stories is useful to me so I won't go into that unless you actually want me to.
Anyway, sometimes collections by an author conveniently have one story per href, and even have the name in the toc. Example:
http://i.imgur.com/lxBTuBw.png
In cases like that it would save so much time to be able to tell EpubSplit to make one epub per selected href, automatically using the toc name as the story name, and the book's author name as the author. Then the cover would just have to be chosen once and all the stories could be split off in one go.
Any chance something like that might be added?
Edit: Forgot to mention a minor bug. On the edit metadata screen, hitting Cancel or the X in the top corner makes a new epub even though you canceled.