The new user profile pages are great but they are missing one thing: a star icon so that the member can be added to one’s favorite/starred list on the left sidebar.
Currently, the only way to favorite a user is to go to their ‘new’ user profile page and click on the ‘View all tasks’ button, located on the right of the ‘Tasks’ panel in order to get to the ‘old’ profile page where the star icon still exists. Seems like quite a workaround… 
seems like you can star both user profile pages as well as their tasks visible to you (old profile page)