All of these thingies should not be documented unofficially.
This should be together with patch notes. As someone studying IT I can tell that stuff is being changed here and there. Aka people are trying to make base game stable before adding new stuff.
But most people do not see that. What they see is only new costumes and "events" for cash shop.
It really makes it look like game publisher does not give a ****** about the game and its content, but is only trying to make moneys from cash shop.
In the end, what makes people stay and love the game is new content and stuff to do. Not do the same dungeon for 100th time with different hair color.