I love these Wolf chapters, they are completely unnecessary but they give such life to the world of Gate.
Recently i was thinking what gives credibility to a fantasy world and i decided to use Gate as one of my templates of analyze, my train of thought is a little long so i will summarize, in the end comparing the manga with the anime (i didn't read the LN) that in the case of the manga at least the artist gave it amazing diversity, if you stop and take notice of the background character you notice that every one of them has such detail to them, the care to make this world brim with such live is breathtaking XD, and like i said these wolf chapters are completely unnecessary but they make me want to read more and know more about the world of Gate.
I guarantee you this if i only watched the anime and only this existed i would never give the care and love i have for this series as I have with the manga.
If you read all of my comment i thank you for your attention have, a nice Christmas and a happy new year.