Milton Keynes Dons
Mike Dove - no longer HOYD as he left the club in August 2018 (hopefully this is a valid link: http://ucscspurs.com/communities/2/004/013/642/922/files/4635923309.pdf employment details towards the bottom)
Luke Williams - new assistant manager although I think this was too late for the data cut anyway (https://www.mkdons.com/news/2019/november/williams-appointed-assistant-manager/)
Dean Thornton - based on his Twitter profile, he ended his GK coaching role at Chinese Taipei when he joined MK Dons (https://twitter.com/DMTkeepers)
Based upon MK Dons' website (https://www.mkdons.com/teams/staff/), perhaps Jon Goodman is now HOYD (or under-18 Manager) and Simon Dwight is under-18 assistant manager? Both are listed are first-team coaches in FM20
Finally, not 100% sure but I think Steve Perryman was part of Paul Tisdale's team so may have left with him.