I am currently playing a deity game on the latest SVN as of about a week ago. Since V27 the concept of military captives has been added, which are units you get (probabilistically) on defeating enemy military units, and which can be upgraded to military units of your own or settled as settled slaves (and other variants depending on techs/civics I believe). I **really** like this mechanic, BUT I have found it makes the game way too easy currently because the AI doesn't know how to use it. For the first time for a long time, starting on immortal, and immediately increasing to deity, I got into the lead by the end of the prehistoric era (without taking out any AI players - just with hunting and hits ion barbarians to get my captives). A LARGE part of this was hugely increased productivity from having a few settled slaves in every city, which the AI has not seemed to do at all. I love the feature, but it desperately needs some supporting AI work.