I got used to the new UI, its much better than classic one, add it to Cataclysm as an option please. I dont want to bother with UI addons, Retail one is good enough, I just want to copy my retail settings and get rid of elvui. Players should be able to chose what they prefer.
It doesnt affect gameplay and a lot of people use different ui addons anyway so it wont affect “classic experience” or whatever.