Do not upgrade to Android 5.1 right now if you depend on that Droid Turbo phone to work. All of these painful bugs and changes on how to use remind me
of going to v4.0 and later to v4.4. They are normal and really drag out with Android versions. Primarily it is a Google Android issue and not a Motorola issue.
Once you feel comfortable going to Android v5.x, there are some fundamental changes in how you use the phone. You need to know and read about these in advance. Search and read about them.
Every new operating system comes with changes in use and bugs. All of them. Without any exceptions. Servers down to Phones.
So do not be caught in all this Android drama and bugs and questions on how to use. Just wait until things work. Things that work and you know how to
use is very much more important than latest state of the art.
Respectfully