Change the padlock next to the address bar back to green from what it is now (gray).
I liked how opera kept the padlock green instead of turning it gray along with the rest of the address bar like in chrome. I also liked how opera continued to show the EV certificate in the address bar instead of hiding it under the (now gray) padlock icon, also like in chrome. Please consider changing them back!
(or, at the least, you could put a flag in opera://flags that toggles whether or not the ev certificate and green padlock icon show in the address bar)