What good is Feedback when Google is determined to take away features from something like Google Books? You can complain all you want but they won't revert. Just making it easier to complain does nothing to fix anything.
Agreed. In my experience Google is notoriously bad at customer service of all types, and attempts to share constructive feedback are ignored. So making it easier to provide feedback is worthless if you don't have a system to actually interpret and implement that feedback. I think it's simply a move to make the user feel like their suggestions are valued.
Google Play Books is not books.google.com, which has all the public domain books they got from public libraries.
The specific functionality they took away is devastating to regular users like me. When searching, results would show if a book was already in your library. You could also add it to a shelf from the search result itself. Now the search results lack that info and you must click on each result to see if it's one you already saw. This is sheer hell for discovering books that weren't there between searches.