I don't know if he's ever explicitly mentioned his "wrongdoings," but I do feel that he has changed for the better since the libav split. This is in terms of how he's interacted with people on the ffmpeg-devel mailing list, he's shown up consistently on IRC, and getting patches accepted aren't a royal pain as it was in the past. I don't know how real contributors/maintainers feel, but as a user and sometimes patch-submitter, I feel like things have gotten better.