After a WEEK, they managed to patch something in Dishonored 2. A full week and they published a betapatch which fixes these problems:
- Mouse improvements, including a fix for sensitivity being framerate dependent
- Fixes an AMD cloth physics issue, which impacts framerates at various points in the game
- Fixes an issue affecting CPU task priority - the game no longer switches CPU task priority
This took SEVEN DAYS. I can’t wait how much time do they need to fix the random and massive fps drops 
UPDATE: And all this 3 fixes is included in a 6,4 GB patch