Changing publisher sure is a proper reason for delays. I don't know anything about book business but I'd expect a lot of paper work.
This came just to my mind: Did it not take Tor over one year (even over two?) to publish Sword after Julie pronounced it finised for the first time? So, even if she finished writing this year, we might not read Watcher this decade.
On a side note: Fall 2007 Julie
wrote herself that she'd finish Watcher 2008. I gather this did not come to happen (you would have told us, wouldn't you, Julie?

). I won't complain, I know about workload besting you. I just get the impression that creative minds take their time when needed (and maybe even when not

) and book publishers think more of profitable release schedules than of waiting fans. At least the first may be as it ought to be. I rather wait for years and get an enthralling masterpiece of a book than reading poor written junk in short succession.