It's just the battles and navigating the menu(saving/loading etc) where it's slower. Cut-scenes are very smooth oddly enough . Before I updated saving/loading was instant but now it tends to take 20 seconds or so. The lag isn't by any means bad it was just unexpected when I was running it fine previously.
Thanks for the fast reply though, I'm gonna do a fresh install and then play with the graphics settings before I continue my game. Definitely looking forward to that beta update though. I'll just have to keep replaying this and Loren to hold me over