I would imagine they are working on a PC patch, but they're taking their time with it. Remember, the graphics in the PC version are in line with console graphics, and there's much that needs fixing. It takes time to go through all that code, figure out what's causing the issue, fix it, test it, fix it again, test it again, etc until it's right.
Simply put, would you rather have a patch now, and perhaps have a game that acts worse than before, or have a patch later, and have most issues fixed?
I think Crytek should release a patch now just to listen to you guys piss and moan about how the game is worse than before. Hey, you rushed them, so you'd have to deal with it until next time. That's the trouble with most people - they want what they want when they want it.
It reminds me of that old "I WANT MY MAYPO" commercial from the old days.