So if Jim is able to do that, it should, when he gets the hang of it, shorten his writing time.

I don't think it works that way.  I'm no expert on writing, so I'll give a quote by someone who was:

“I didn't have time to write a short letter, so I wrote a long one instead.”

― Mark Twain

I can't imagine a skinwalker falling in love.  Unless there are good skinwalkers, which you would have to show me proof of.

I think if you re-read what he wrote you'll likely conclude that he meant the woman falls in love with the Naagloshii, not the other way around. 

IIRC, there was a "Word of Jim" that Molly was supposed to become a warden during the events of Dead Beat, but since the publisher wanted him to move up that book for various reasons the chance for her to redeem herself by becoming a warden didn't take place.  It seems like he might have written that part (and that book) already and left that part in.  I think Molly's story would have turned out very differently as a warden.