Contact card in search tips
In the old version, in the search box, I could type the name of a contact and quickly click on his contact card from the search tips.
Now I have to perform the actual search and then click on the name of the contact to make the contact card appear.
Jacob Andersson commented
This was a feature I was using A LOT in the old version. Now since you have to click on the profile the email you were writing will close and go to draft which is really annoying.