S!
Did smoothen things, but had first Launcher.exe crash after running Black Death track. So cleared Cache, restarted computer and worked again. Still get occasional pauses/stutters while the game loads(or whatever). Especially around buildings, sometimes above water.
Black Death gave lower FPS average than before. Dropped from 34-37 to 30-32. Also seems the view in BD was more zoomed out. Anyone noticed this? Shadows flicker at distance but if you look at them within "the circle of LOD" they most of times do not. Three blue stripes are in the horizon.
Step towards right direction, but will wait a few patches before making any conclusions. Would be happy to have the AMD related issues sorted as I want to try CrossFire
More testing to commence..