Is there any way to be notified when a series that you have in your completed list

gets their status changed from completely scanlated to not completely scanlated

have a new release

Because sometimes I have series that I really love and they have been completed already.
Then suddenly out of nowhere, there's a new release of an extra or oneshots and I wouldn't want to miss it.

New Releases of a subscribed series all get highlighted regardless of the list you chose and the "completed" even get the usual green V next to them so they stand out double.
You will have to look out for yourself but you won´t miss a beat if you follow the "news ticker".
(Unless the releases get submitted way after the fact.)
Not fully scanlated series as Sayonara Zetsubou-Sensei need a NO in the box you mention and not a YES. Flip flopping in that filed is usually the sign of a mistake and we are ultimately our own masters when lists are concerned.

Oh yes: Rips don´t count as scanlations so Kazan and co also need a NO in that box.

I also read EU/US comics and am a librarian.
Manga-Masters, My ANN-Lists + Imdb

Ahh yeah, I spotted one in the release today! I haven't started reading it and the series was completed around 90 days ago. Then there was a oneshot being done. So it got me thinking. Thanks ~