There are no UI changes, only the discoverability protocol changed. Instead of using /.well-known/human.json, the file is now discovered via a <link rel="human-json" src="..."> element, according to the new version of the protocol (0.1.1). This allows the protocol to be used in sites with multiple users, for example:

https://example.com/~alice
https://example.com/~bob

Since each user can have their own human.json file.