Movement appears to occur at 40hz, which lowers the framerate when you're moving. Other characters do not lower fps when moving, only your own.

Is it possible to edit a file to change this speed?

I'm visually sensitive to low refresh rate video and it gives me a headache, I can only tolerate things like tv shows and movies for short amounts of time before I get a headache and a slow response to my input makes it worse with games. I want to play all the divinity games, but I fear that I'm not going to be able to handle the refresh rate on any of them.