It's ok for those who have screen sizes of 15 inch's and up but it's not supported well for those who have 11 inch screen size. All it does is fade out everything around the editor and does not go full screen.

It looks the opposite of distraction free writing. Also if you move your mouse over to the side a little and everything re-appears, the distraction free button still thinks it's active.

If it was able to go full screen properly like before while using the full visual editor of TinyMCE, then I would be happy. Otherwise for me, put it back the way it was please.