Unfortunately that setting only affects the overworld, it doesn't affect the combat which still has the Depth of Field even with that setting turned off.
And as I mentioned before, in this game values appear to be hardcoded as forcing the usual values (r.BloomQuality=0, r.DepthOfFieldQuality=0, r.MotionBlurQuality=0) through Engine.ini doesn't work.
I wager you'd probably not be interested in making exefs patches for those right? How do those patches even work by the way? Looking at the TAA for example it appears to be IPS header and then what are the values after that? Offset which to change and value which to change?