Here is all I found on this update/patch
Call of Duty: Advanced Warfare's Latest Patch Adds Grand Master Prestige Ranks
Grand Master Prestige Ranks and a new gun have been added to the game.
by Ian Miles Cheong on 3rd Mar, 2015
Players of Call of Duty: Advanced Warfare will be happy to know that the game has been updated with a host of fixes and additions, including a new weapon that's available exclusively to DLC Season Pass owners.
The update went live today on both the Xbox 360 and Xbox One without any official patch notes, although fans report that among the new additions are new Grand Master Prestige ranks, along with emblems for the new ranks.
Additionally, the font size for the killfeed has been adjusted to be more legible and there is a new layout for challenges in place. Exo Zombies mode can now also be paused, which is great because it allows players to strategize ahead of time.
Season Pass holders will now have access to a new gun called the Ohm and its custom variant the Ohm Werewolf. Here's what it looks like:
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