Yup I think so too. It's definitely something CPU related, and they're still tweaking all that stuff.
Before the patch, if you set bf4.exe's priority to low, it would make little to no difference in the performance, but now after the patch, doing that drop the frames to like 30fps. So they definitely did some CPU related tweaking in the new patch. But ya, all that will be sorted with the release so I'm not that worried. Taking the beta with a pinch of salt right now. It's playable in some form at least. Enough to experience the general feel of the game so I'll have it for the time being
