I own a server with a decent amount of roles without dedicated text channels.
If there is a dedicated text channel for the role, its easy to see how many (and who) has that specific role given the perms for the channel on the right side of the application. There is also the option of going into Server Settings > Members and sorting by role.
Though this is close to what I feel like I am looking for, it doesn't have stats on the roles such as how many members currently have the role, or what voice chats and text chats they can access unless I physically right-click each text/voice channel for role permissions.
I suggest adding a list of members under Server Settings > Roles to easily see who actually has the role granted to them even if its just a simple drop down menu for quick reference with a number at the top to see how many people currently have the role, as well as some sort of quick list to see which channels the role can access (again, even if its in a simple drop down menu)
Something like that would be nice.