Remember when the Nexus 5 came out and how bad the camera app was on the Nexus 5? And remember how the camera was improved over time?
Well it's basically the same story for the Manual app and the Camera FV-5 apps (the only apps that support RAW i.e. DNG shooting using the new APIs in Android 5 Lollipop). It's buggy (crashes randomly in both apps on both phones; only Nexus 5 and 6 have full RAW API support) but has great potential. Check out these pics:
Manual app, Nexus 6, DNG edited in Lightroom, Whistler Olympic Park:
Camera FV-5 app, Nexus 6, DNG edited in Lightroom and Silver Efex 2, Mozilla Vancouver reflection :
21st century cameras are social and on the internet and awesome-ized by software and sensors