I think I have figured out why you and I have differing views on this.
I keep my entire library in CC. I want the CC view to be exactly the same as the Calibre view. For me, my books in CC are "My library" and I always want all the updates. If a change was worth making in Calibre, its worth seeing it in CC too.
I think you have said that you only keep a small part of your library online. Since you are seeing a subset that might change to a different subset, you don't really care if all the metadata always matches you Calibre library.
In any case, while I wouldn't mind if books always got updated on any change, I'm pretty good about doing this myself, so this is more of an academic discussion for me. I've got a couple of things I would much rather see you do first anyhow.
