If it ain't broken, don't change it. They should have kept using google maps.
Apple is trying to distance themselves from Google since its becoming a rival. It sucks for users obviously but it's expected when it comes to competition in the tech world:
Apple has sued several companies that use Google's Android software. Google has not been the target of an Apple lawsuit, but competition between the two tech giants has heated up in recent years as the market has shifted from PCs and laptops to mobile devices. Motorola Mobility, the smartphone maker now owned by Google, filed a complaint against Apple, claiming infringement of several patents including one linked to Siri, Apple's popular voice-recognition apps on iPhones.