The majority of the bad press that apple maps suffered from was because of lost of data/accuracy and features (transit) due to switching away from Google. There were a few articles regarding flyover problems, but that was not the focus of the backwash. So considering the new Google maps doesn't suffer from these problems, double standard not found.
Also, backwash from apple maps didn't really pick up until it was released to the public, which hasn't happened with the new Google maps yet.
Is backwash worse than backlash? Besides Google Maps is just a little more accurate than Apple Maps. GM will return results whether they are right it not. AM will return correct results or no results at all.
Forcibly? I didn't upgrade immediately and I could still use Google Maps. In addition you could still get Waze and other mapping solutions.