Well, looking at it, it seemed that the original plan was scrapped because the plans were too long. 11's definitely not the final volume now. Things aren't as funny in this volume as they are in the previous volumes, but I get the feeling that the author's trying to wrap up lots of loose ends ASAP (though one particular aspect in itself feels very rushed.)
And now, for a very spoileriffic moment, right at the end of volume 11.
I think I'll only have time to work on this in September. 4 Unicorn volumes, 1 IS volume, 7 from one series, 4 from another...the workload just keeps piling.