Nerfing any character is completely uneeded this isn't a competitive game, no character is so powerful that they cause you to be at a severe disadvantage if you play a less powerful character
Nerfing Wolfgang, Wickerbottom, or WX78 will simply make the game less fun for a lot of players, if any changes for these characters occurred they should make the characters have more enjoyable abilities rather than straight up redmoving what makes them fun
Klei's focus when making refreshes is mainly the make the game more fun with interesting new abilities and to make weaker character be able to do better in fun ways
This is why I don't think Klei will nerf any character