We respect werdna's privacy, and so we chose not to make public the reasons he is no longer a mod.
It was not our original intention to "de-mod" werdna. There were certain things we were unhappy with, and so we offered him a probationary period to give him a fair chance to correct these things. It was werdna who declined our offer of a probationary period, and chose to no longer be a moderator. We were sorry this was the outcome... please let me make it clear that werdna is a valuable member of AN, and we're grateful that he continues to put a lot of time and effort into his fantastic essay marking initiative.
I was the one who locked werdna's thread. I did this because werdna suggested it be deleted, but I didn't think that deleting it would be necessary. However, I felt something did need to be done about it, because I didn't want certain comments made about werdna being immature spiraling out control... werdna's choice was his, and he didn't deserve to be questioned about it. No moderator deleted that thread; I can only assume that werdna deleted it himself for his own reasons. If this was not the case (which honestly wouldn't surprise me, given AN's volatility since the upgrade), I can ask Nina to try and restore it.