Fantastic write up Mark
I too did some limited testing and let me tell you the performance is certainly better than Warhammer 2, but man some settings are insane!
TAA in my testing easily eats up 11-12 FPS. Shadows also are extremely demanding, basically everything that was extremely demanding before still is. Though the major improvement to CPU performance is definitely helping make it a more consistent and better gameplay experience.
It looks like I'll dial down every setting except unit sizes to high. Not much benefit using more based off the screenshots.
I also would like to see separate settings for campaign and battle. They can be so much different in terms of framerates it's makes you have to take into account both modes and dial back settings.