Board Thread:General Discussion/@comment-5650937-20200601135419/@comment-9605025-20200601163948

There are a lot of changes with UCP and a lot of features haven't been ported yet. There is no option to use the "older" user masthead design. What you see is the new and only available design. Similarly, UCP does not have classic editor. With the exception of InfoboxBuilder, none of the editors are the same. As you may or may not be aware, thread-based discussion features (Special:Forum, message walls, article comments, blog comments) are being replaced with Feeds-based discussion features (Discussions, new message walls, new article comments).

I didn't know you could revert your avatar either. It must be a UCP feature because, for the longest time, the answer was that you can't. How did you do this? If it didn't work, it is probably a bug. Please report it to staff and, if you feel up to it, add it to User:Noreplyz/UCP.