Wouldn't that be something much more subjective, while certain things like those about overuse of bright white and effects of that or other loss of usability are more objective?
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Where is this feedback that shows that?
Based on the small number of users complaining compared to the millions of active users objectively you could say most people like (or at the very worst don't dislike) the new UI.
If you like the UI or not is a subjective thing but the overall stats on people liking it or not can be fairly objectively calculated now based on the number of users and the number of articles and complaints. It is a few months post release now so I think it is safe to say most people don't have a problem with it, if most people hated it the internet would be melting over this huge issue instead of a few threads on forums here and there.
This is no way negates peoples views who dislike the new UI as wrong but it does point to most people not having a problem with it or even perhaps liking the new look.
Edwin