Straight from the developers:
We wanted to take this time to talk about why those changes were made and what we consider (or don’t consider) when adjusting a class like this.
There are two main considerations when we make these types of changes: 1) player enjoyment of the class (the most important consideration); and 2) how much design space the class has for us to work with.
You’ll note that “power” is not a consideration for these types of changes. We’ve seen some questions and comments about why we adjusted Paladin when the class already seems strong. The short answer is just that power isn’t relevant for class tune-ups: this is about adjusting fundamental issues with a class, not its power level.
They do not consider “power,” but “enjoyment” (i.e., “fun”). They have stated before they do not want to be restrained by balance regarding design.