It is not only SoA since patch 9.05…
Starting anima conductors in Bastion, Ardenweald and Maldraxus is the reason for fps drops, got a permanent stream? Then you got permanent fps drop!!.
Please check the other topics about this problem and help us bring this to Blizzard there attention.
+++https://eu.forums.blizzard.com/en/wow/t/video-proof-of-fps-drops-due-to-anima-conductor-msinfo-dxdiag-included/261600+++