Google Play Services was a hard dependency. People complained about it all the time and asked to remove it. Now they have finally done what users have asked for, and what is the reaction? "Who the heck needs this?" Well, that's how it always is.
The problem is, only the people who want something ask you about it. No-one's emailing to say "hey the Google Play integration is great - don't remove it!"
Then after you do what the people emailing you wanted, all the people who were silent chime in. "Wait a minute, why were you spending your time on that? None of us wanted it!"