Quote Originally Posted by RyuDragnier View Post
In an interview, he mentioned that the healer they play tested new dungeons with got too good at healing them, so they needed to replace them for somebody lower skilled to properly see how the dungeons work with lower skilled healers. Paraphrased by me, their previous healer hit Savage level, and they needed a DF level healer.
That's a reasonable reason to swap someone out. Doing QC testing with someone who's in the top 2% of players isn't representative, so having someone less skilled or new to the role is a better option. I'm in R&D and when I need to test something late-game I'll ask someone here who hasn't worked on the project to get an idea how the first time or average user does instead of someone on my team who's very familiar with the thing.