I've got an i5 3570k 4.2Ghz + 16Gb RAM and GTX 970. The game runs fine on Very High with 60 fps on cutcenes and also most of the time but there are drops and jumps to between 40 and 60 depending on the area you are in. I've honestly never been bothered at all by all the FPS craze in gaming, I think 30 fps is absolutely fine especially in a game like this one.
When I get home this evening, I'll try to set everything on ultra and fumble with some settings like shadows and view distance and will be satisfied if I get these 30 fps (maybe even more?).
I'm sure that most of the frame drops and freezes are just due to poor optimization and will be patched. Similar stuff happened with the Witcher 3.