I can certainly appreciate visual problems (when I had vertigo issues that was one of the two things in combination that forced me to quit playing UO).
Interesting though that you mentioned all the movement of the EC vs CC. It's been forever since I played CC, but I remember the video being more choppy but not any less movement in CC vs EC. There are a lot of settings for video in CC and EC, and I'm wondering if one of those might make a difference (maybe making both of them better for you). Maybe a smaller screen size zoom, or smaller max frame rate or different UI scale might help. *shrugs*
I'm going to install the old CC and play around with that and EC and see if anything jumps out to me that might help you out.
Like I said, video issues SUCK.
KD