New Opera UI is not an Opera UI. just put your left thumb up and cover the top left corner of the browser, BOOM!, its chrome! wait, its FF! there is no unique distinction. you could say the icons are different and such, but in truth it's the same. I don't see the point of using opera if chrome is opera big bro.
To say that the new UI is optimized is BS. It's conformity. I am using latest opera next and try getting around my usually browsing, 80% of the time i was like "What!?", want to duplicate a site, i automatically move my mouse down then up, "What!?", found some ads intensive sites," hmm.. i need to open this link", right click context menu then "open", "what!?" there's no "open" menu? only got "open link in...". So technically i need to close previous tab each time to get to the links i need.
To more personal customization, i always have my tab bar bottom. i rarely touch navigation bar at all, F8 to type in address, mouse gesture to navigate like a boss, you can even minimize/maximize that certain tabs |http://i.imgur.com/Z1XTJmj.png| it's uses, i don't need to tell you, too many to count and the best part, just hold right click drag up then right release. If you want to login to any sites, already saved your login ID and passwords, just forward, don't need to find and click the login button. Bottom tab bar is way efficient, when you switched to other program and back to opera again, you always find you cursor cruising top bottom top again. It's not lazy it's efficiency, like mouse gesture is efficient, you can use navigation bar on the top, but mouse gesture there to navigate faster.
My point, we need to whine. Whining is essential for progress. Even if opera turn a blind eye there will be other people who wants to bring back opera to it's original form, maybe through open source.