User blog comment:TheSonofCharlusPotter/Features/@comment-1400578-20180515061911

For my 2 cents, I think while the Custom User Rights suggestion might seem like it would "make the wiki look more professional", it would ultimately just make things unnecessarily confusing.

If you look at Special:ListUsers, there are 24 different user classifications. Even if you just do this for the more common ones, that would still lead to confusion in reporting issues when you can't remember if a Merlin/Grand Sorcerer is a Rollbacker or a Discussions Moderator or an Administrator or a Bureaucrat or a Staff Member or VSTF, etc., etc.