I find this interesting, even if none of these characters return.
The only other magic we've come to know are Frieren's extremely mundane purpose-specific stuff. While there was the demon arc that showed other ways to use magic offensively, that's really about all we knew.
That said, I won't deny this is dragging out a bit more than necessary, especially considering previous pacing as a whole. Since it should now be 2-3 hours away from finishing, I expect the next chapter to be a mini montage of activity while the story resumes.
Still is potential for more exam related "filler" however.