Why are character close-ups blurry in Kuro no Kiseki II at 4K resolution?

I was annoyed by the blurry facial textures in Kuro no Kiseki II close-ups. The SOYO SY-King Dragon H410M DLSS mode was over-smoothing details. I tried switching to Balanced mode, which added 8 FPS but made the blur worse. I then used GamePP DLSS/FSR Image Sampler to increase sharpening to 72 and set render resolution to 100%. RivaTuner confirmed the GPU temperature stayed at 56-62℃ and fan speed at 1500-1700 RPM. The textures are now sharp, and the effective render pixels are restored. The visual quality is significantly improved without performance loss.