I heard from my editor. She's very happy with the manuscript, post-post-copyediting. I think the decision to accept the rather unorthodox copyedit was the right one. Lots o' work, but heck, it's my book. It did give me a chance to polish it all a bit more, and add one surprisingly important bit of character logic that had escaped me. Always surprising what a couple of lines can do.
The new book is going nowhere. I haven't written more than two pages since last October. Suffice it to say that the last few months have not been right up there on the list of Good Times I Have Known. This does not lead to much writing. Oh, well.