My MOTO G was officially retired this week. It is a solid device anyway. I just need to upgrade it to a device with larger memory.
After upgrading Android system, wiping cache partition is helpful for maintaining a smooth operation. I did it on KitKat 4.4.4.
A factory reset fixed all system lagging and battery draining issues on Lollipop 5.0.1. It is recommended for Lollipop users.
Microsoft OneNote cannot connect to server under Android Lollipop 5.0.1. It works well under KitKat 4.4.4.

