First, thanks for this great plugin! I've been using it since before you removed the "Create" from the name.
Second, I have one idea that I'd love to see implemented. That is the option to tell the plugin something like "create the 'custom column' collection, also create the 'series' collection, then if there is no series, create the 'author' collection." This would DRASTICALLY cut down on the number of collections I have while being very flexible to use. It would require the ability to sort the collection creation strings and decide if they're "and" or "or" strings. And it might be a bit more complex than that... but even just that simple would be great. If this isn't clear (and I COMPLETELY understand if it's not), let me know and I'll try to restate.
And one nitpick that's not important, but would be lovely. It would be awesome for me (though others might not agree) if the "author sort" collection was per name (if, for example, I had a book by Joe and Jill, to have them collected into "Joe" and "Jill" instead of "Joe & Jill").
Again, I love the plugin. Can't imagine trying to use Calibre with my Kindle (and the ton of books I've collected over the years) without it.
