Maybe I am the only one, but I do like the new interface. Looks less cluttered. Reminds me a bit of Sublime Text perhaps? Gnome is moving to the new interface guidelines (that's why gedit has changed). I see many ideas from the Mac world (top menu, no file/edit/about menu in the same screen, few buttons, big tabs, etc.).
No announcement yet.
Gedit For GNOME 3.12 Receives Brand New UI