As I share my PMS with several people, and others share with me in return, I would find it a great convenience if I could customize the names of the users in my list, as opposed to is just being stuck at their Plex username and server name. I'd love to be able to edit those fields as well, just for my use, in organizing them, as I share more and more with other people and add more and more shared servers to my list.
As almost every other field is editable when it comes to PMS options, this seems like something that wouldn't be too difficult to implement, and would really help me keep track of who is who on my list.