Luckily I don't have the October 8th patch installed so I'm still able to tweak the cvars (you can increase enemy dmg, accuracy, health, your own health, regen rate, dmg, etc. etc. etc.) so for those looking to make the game "harder" go check the steam powered forums for some CVAR tweaks to make the AI really nasty, disable or limit your own 'health' and regeneration, and make the vehicle combat actually challenging.
Anyway, just curious if anyone knew (only curious because I'm sure you'll have to be 'updated' for any DLC.