Patch 7 beta has broken campaign... Probably best to avoid it!

[Slaists]

Ive had zero real problems, save for a problem with playing a joint naval siege battle which causes huge lag.

Hmm, really? You do not have a problem with thunder-rain weather when FPS drop to zero even before you get to the battlefield? What's your rig? Mine is 4.2 Ghz quad-core with 16 GB Ram, and GTX 680 card; still have that rain problem.

I also tend to have slowdowns during siege battles when massed fire-missiles come out. It seems, I am able to reduce the effect of that by turning missile tracking off.