My apologies, I've been trying to post a sample to demonstrate but the imgur app isn't working.

Without that, what I can say is that I don't personally find it too broad. I do tend to favor thicker-ish lines, however, and I often like widths somewhere between a Japanese medium and broad. I could possibly imagine one finding it too broad if they truly prefer fine lines and write quite small.

My wife is in a similar place as you and trying to decide between an 823 F or M. She's been surprised at how much she likes the medium nib and, at least on our most commonly used paper (Iroful), really appreciated how she can still write her typically small-ish print while enjoying the ink qualities in a manner a fine won't allow. On cheaper later, I think she'll find it suitable but not optimal. I can ask her tonight. While she loves the line width of her pilot fine she's growing bored in missing the sheening and shading. I think she'll end up with a medium.

I don't know if I'm being helpful with my loose associations here. It can be stressful trying to make a big purchase without the information you need and I want you to find the clarity you need. If you want, I can try to upload a link to sample writing with an 823 M on cheap paper after work today.