We will be updating phabricator on wmf soon and since the last time we last updated there have been almost of user noticeable updates done upstream.
For starters, differential is getting some new colours for it's diff, You may notice the lighter green for colour blinded users, same for the red.
The quick create dropdown you see on the top bar has been replaced with the new favourites application, this will now allow users to define things to go in there. Admins can now define global's too in there.
Differential is under going some major infrastructure changes as it migrates to EditEngine, same goes for audit.
The difference users will see is differential comment box will look different.
Users may notice more bugs in differential and may see some fixed ones.
The top bar has also been redesigned which not all users will like (IE the username dropdown is now on the left of the search bar instead of the right. (We can if most users doint like this change, change it back to the right without reverting but will require feedback for this)
I have deployed the update onto https://phab-01.wmflabs.org but you will not see the updated favourites application yet as we still need to pull this release https://secure.phabricator.com/w/changelog/2017.03/
We will also need to prepare wmf phabricator for the changes as i have no idea if we will need to re add all the things we added to quick create onto favourites.
There have been many more changes not described in this task, if you see any more please do add it to this task.