-> Screen becomes very dim when brightness is set to Auto and ambient light is low. If Power Saving mode is also enabled, the screen goes almost fully dark
-> WiFi connection becomes unstable after some time (Download Booster disabled, WiFi is always on)
-> Menu after Long Press on Power button no longer allows phone to be set in /Sound/Silent/Silent mode
-> Lollipop Material Design has too many white screens. Not good for battery and glaring white light is disturbing when used in dark. Wish Touchwiz had an option to darken the colors until Android offered that option
-> Android 5.0 only .. not Android 5.0.2. Not sure how this affects stability
-> Battery life is slightly lower with similar usage pattern .. may need some time to stabilize
-> No major changes observed in RAM and CPU usage
Please add your observations/issues/remedies to this thread