The build that just went out, 70245, has the fix for “Secondary Lighting” incorrectly using RAID graphics settings, even if RAID graphics settings are disabled. This could be the source of some of the performance regressions reported since this could easily make Secondary Lighting run on “Good” even though the UI said it was on “Fair”.
I’m cautiously optimistic to have a fix for the crazy shadows in time for the build that will go out later this week.