not sure why IW hasent put up a post telling what the update was ...
The only thing I know is that something has been done to the operations. When one tier is finished it automatically goes to the next now. Also it shows progress when looking at the patches. Other than that I have no clue.
<blockquote class="twitter-tweet"><p><a href="https://twitter.com/search?q=%23CODGhosts&src=hash">#CODGhosts</a> now supports Clans for PC! Join, create, & manage a Clan w/ the new Call of Duty app on iOS/Android/Win8 <a href="http://t.co/KVs2qS9bSt">http://t.co/KVs2qS9bSt</a></p>— Call of Duty (@CallofDuty) <a href="https://twitter.com/CallofDuty/statuses/399292303292243968">November 9, 2013</a></blockquote>
<script async src="//platform.twitter.com/widgets.js" charset="utf-8"></script> It's the only thing i have manage to find so what my guess is there updating the systems ready for the new playlist which it states here getting ready for S&D on the 15th and this post was 14 hours ago if anyone has any new info please let me know thanks.
It takes time before they give out info on what the update does. Its been like this for eight years. Give it time.
give them time games that are broken out the box dont need time .... they need open beta's so things get fixed before the games come out... and yeah it has been like this for 8 years so you'd think maybe a Activision /IW could get it done right ... but nope
not true. the last few call of duty games had the updates up in the forum section right after they were released