One of the complaints our GM had, and a pretty obvious omission in Mass: the Effecting (http://wiki.rpg.net/index.php/Mass:_the_Effecting), was the lack of pregenerated antagonists. Either for quick pickup, or as a starting template for making your own opposition.
With some downtime over the holidays, I've made a start on some, which I'd appreciate it if people had a look at and provided feedback (is it useful, have I covered enough bases, are they easy to use, etc). They are contained in the Rogue's Gallery (http://wiki.rpg.net/index.php/Mass:_the_Effecting/Rogues_Gallery), a work in progress. Shooters and Mechs are almost complete.
Bear in mind that our combat rules are different (http://wiki.rpg.net/index.php/Mass:_the_Effecting/The_Way_The_Galaxy_Works), which affects how armour and weapons work (though it's broadly in line with the God-Machine Chronicles).
I'd particularly appreciate any thoughts on my fumblings with geth networking rules - ie the more geth in close proximity, the better they get. I'm trying to make it interesting and worthwhile, without getting too complicated.