Klepar Then I suppose my point is I disagree with your definition of harem. Harems do not necessitate attraction in my mind, they just necessitated a close connection with the MC and ignoring any other part of their life as 'unnecessary to the plot.'
As for your point about one-off characters, I would not want that either. I want characters that regularly interact with witches fleshed out. For example, there is this one group of friends from the castle near Neverwinter that used to all be rats. One of them had a crush on another that turned out to be a witch and ... nothing. Haven't heard from him in 500 chapters. The witch, I think it was Summer or something, keeps coming up in filler chapters when the young witches want to go on some silly little quest and get lightly scolded by Roland at the end. At no point does the author ever show dialogue talking to another man.
Nana runs a clinic, but we never see her expressing her bedside manner with the patients, in fact I think she has spoken maybe ten lines in the past 500 chapters; all directed at Roland or another witch. Agatha works with the chemists, but do you remember ever reading them discussing their work together or a description of their cooperation on an important experiment in detail? Scroll is the Minister of Education, but the only time she is ever brought up anymore is when Roland is telling her what to teach next. And you are honestly going to tell me that when the author spends entire paragraphs detailing how Ronald wants to pet a girl with dog ears, or inwardly laughs at the mischievousness of the younger witches that such information is critical to the story?
The crux of my argument is that witches' relationships are only developed with Roland and other witches. Think of any other harem and you can say the exact same thing about their stories. Having more men in this one does not change the fact that they don't ever get close to the witches. Even if most of the witches relationships with Roland are platonic, I don't think a single witch has a relationship with a non-witch, outside of family members, stronger than the one they have with Roland.
You can argue that there are simply too many witches to give all of them the detail they deserve, but that doesn't wave some magic wand and allow you to ignore that the story only develops their relationship with the MC, it just highlights the issue. That also makes me come up with another point, why so many witches anyways? Their powers are starting to become redundant at this point. There is a magnetism witch that can make electricity, and hey, now there is a lightening witch. If it is true that there are too many witches to develop then why develop them at all? Why not just focus on a few core characters like any other solid piece of literature and let the side character witches stay as side characters? For the most part, the author does this with the males. I think the main masonry guy has been brought up maybe 3 times since the first 100 chapters. On the other hand, each witch in the alliance gets some face time with Roland at least once every 50-100 chapters. It is because the author's main focus is on one man's connection to about 100 women.
A harem focuses on relationships between one man and a large group of women. Most harems focus solely on romantic relationships while this one allows for a wider range of emotions and connections. I will admit this is a change in the normal formula, but it does not change the foundation. The man closest to every single witch, with the only exception being a few witches' family members, is Roland.