Apparently new content may be on the way, during the PAX East panel they hinted at a new faction appearing in the game. Sounds like it is going to be an expansion pack as they aren't planning on revealing any more for a while.
Source:
http://www.polygon.com/2013/3/23/413...pax-east-panel
I'd like to see them rework the game a bit at the same time. Classic Ironman has been impossible for me to play thanks to the RNG of it all, I've lost good campaigns in two missions where most squad members get wiped out in a couple turns even when they're in full cover. It isn't an AI improvement in so much as a higher chance of getting shot even when in full cover, or taking critical hits etc. that makes the game just frustrating. I wished this would happen with patches but they seem few and far between.