A number of long forum threads on the Sony Mobile Talk website and XDA are littered with users complaining about pictures that “lack detail”, are “over sharpened” or look like a “painting”, especially when zoomed in.
The stock camera does not appear to be the problem either as using a third-party app such as Google Camera causes a similar result. This is likely to mean that Sony has changed part of the algorithm or changed the settings within the camera 1.0 API. The Sony Mobile support team are investigating the issue, but has provided no firm solution for now.
Hopefully, a camera fix will be a priority in the next Xperia M2 firmware update. If you are an Xperia M2 or M2 Aqua owner and are experiencing this problem, let us know what issues you are facing in the comments below (some camera samples would also help to highlight the problem).