Apologies for having to post in a locked thread, but regardless of the final decision something needs to be added to the Ranking Criteria about which difficulty names are acceptable and which aren't.
This post is a good guideline but isn't completely clear. An Easy / Normal / Hard / Special set isn't addressed, and one can argue that the average human player can understand what degree of difficulty each one is. Looking through this thread of human players, most can agree that they can understand this kind of naming. With the new star system coming together, it is even clearer to players which difficulties are harder than others.
The rule proposed in this thread is mostly based off of the reasoning in peppy's post, and tries to clarify what isn't clear. Mappers have a right to understand what is expected of them, and having an unclear rule will only encourage discrepancies in what is allowed and what isn't.
to peppy: From looking at your open letter to woc, I understand that you feel strongly about your opinion and like to do things differently, but I think this rule or a modified version can be established and allow you to keep what you want in this game and still keep osu! enjoyable for its users. Thanks for considering.