This sounds like the current version is running worse than the open beta.
I have a i5 3570k clocked at 4.2ghz, 12 gigs ram and a GTX970. The beta at high settings and 1080p was a steady 60fps for me. Something sounds way off.
I don't think this is the case, at least not for me.
I have an i5 2500k running at 4.0GHz (for the beta I was running 4.2GHz), 8GB RAM and a stock G1 970.
I'm running at 1080p with these settings:
And I'm getting 60 FPS just about anywhere, I've tried the prologue and a bit of the tank mission, I've tried 64 player Amiens (which to be seems the most demanding due to the city and how much there is on screen), St, Quentin's Scar and Suez and they all run at 60 FPS 98% of the time with GPU/CPU usage at around 90% each, sometimes a bit more or a bit less depending on what's on the screen. I didn't notice any stuttering, etc, just slight frame drops but this was due to having a lot of explosions, etc, on screen at the moment.
What I did notice however is that the IQ is a bit of a hit and miss, sometimes it looks absolutely amazing but if you start looking at details you will see some things are looking way off, especially for 1080p or whatever the resolution is at 110$ scaling. Things like the wires running from the poles, or trees, etc, it looks not as crisp and you see a lot of jaggies, I don't know it looks a bit off sometimes, I wish I could illustrate better but the screenshot I took somehow came up with compression artifacts, I'm off to work right now but when I have time I'll take another.
Either way the game looks fantastic and DICE is pulling some sort of black magic with the IQ or they are kings of optimization because my performance should not be this good with what I'm seeing on screen.