iOS 6 Maps was “the most beautiful, powerful mapping service ever”, that is when you only looked at it on paper; once you started to actually use the offering it quickly became obvious that the service didn’t deliver, by far in some regions, the experience advertised (and expected). Tim Cook officially apologized for falling short on “delivering the best experience possible” to customers with iOS 6 Maps; Apple went as far as to recommend competing solutions until its own offering became better (competitive).
After the acknowledgement the description of Maps has also been changed on Apple’s website. A before and after screenshot is available above where you can see that the company not only tweaked the description but has also removed a very important bit: “the most beautiful, powerful mapping service ever”. Maps can or can not become that sometime in the future but at the moment it is definitely not; leaving such a tagline there would have not only been untrue but would have most definitely been misleading.