At 1.2 I was able to play this game with a perfectly fine frame rate. Now that I have applied 1.4, all settings the same, I have noticed my frames have dropped. I didn't record specific numbers, but being smooth before to noticeably laggy that I lost all desire to play the game again is pretty significant.

WTF are you doing Crytek??? I've always been one to support the company, I've never posted a negative feedback until now. Their failure of over a month after release has worn out my patience. I'm not even asking much, I've just been enjoying the single player mode until 1.4 decided to ruin even that while not doing anything to help the multiplayer.

Fail.

I agree

If you had a custom config, that may be the case. 1.4 disables most of the CVARS

custom config for all.