A few improvements have been made to user searching and user management in WordPress 4.3 and the upcoming 4.4. Here’s an overview:
- 4.3: Performing a search on the Users screen now searches the user’s username, email address, display name, nicename, and URL, instead of just their username and nicename. See #27304
- 4.4: Performing a search on the Network Admin -> Users screen previously required the use of a * wildcard character at the beginning and/or end of the search term, otherwise the search required an exact match. This is no longer the case, so finding users on Multisite is no longer frustrating and inexplicably dysfunctional. This, combined with the changes in 4.3, means searching for a phrase such as “@gmail.com” now works as you would expect. See #32913
- 4.4: It’s now possible to filter the Users screen by users who have no role (in addition to being able to filter the screen by individual roles), if there are such users. See #22993
- 4.4: Users with multiple roles (it’s possible to programatically give a user multiple roles, although this isn’t possible via the UI) are now shown as having multiple roles on the Users screen. This helps avoid obfuscation of a user’s roles. If your plugin facilitates the assignment of multiple roles to an individual user, you should test it against trunk and look at using the new
get_role_listfilter introduced in  if necessary. See #22959
Any other improvements you think could be made? Leave a comment.