Google is expected to soon issue an Android 4.4.1 update to address the camera performance of the Nexus 5.
According to The Verge, the details will include faster launching, faster autofocus, and improvements in low-light conditions. Additionally, the white balance will get a punch-up as will contrasts. Reportedly, the Android 4.4.1 update is the first of several releases aimed at addressing the native camera on Android devices.
Recent leaks suggest that future Android smartphones will be able to work with RAW image files.