Stability tests for the Moto X 2014 Pure Edition have already started and with the publishing of the full changelog the introduction of the new device to the market started at once.
When you look through the update, it is obvious that there are not as many changes as one could expect because Motorola took the most of the basic Android skin, as they have done before with the Nexus 6. 

Moto X 2014 RevealedThe main changes took place with adding of new features to the device.
This time Motorola dedicated enough time and efforts for creating a changelog so users now have a possibility to look through detailed information about changes and updates of the software.
The most relevant and interesting information concerns notifications and priority modes, as well as changes made to Quick Settings, Camera, lock of the screen and Performance of the device.

With that the changelog contains information about fixed bugs – for example, in the first version of the software alarm clock didn’t work and time didn’t update. Also users had no possibility to delete SMS messages in case if the SIM card was full. Every launch of Google Chrome ended up with a crash and Calculator wasn’t working properly. These are a few of many bugs that appeared at the very beginning of the development process, however, it seems that Motorola has managed to fix almost all bugs that deal with Moto X software and issues with Android 5.1.

At the moment Motorola is going to upgrade the recent devices - Moto G, Moto E and the Droid Turbo from the last Android version 4.4.4 to 5.1 and the first device to see the changes will be the Droid Turbo.
Moto X 2014 Pure Edition soon will be introduced to the market and after that carriers will also implement the device to their plans.