Normally bass boost is not even as noticeable as treble boost/compression/ringing on a filter with resonance, yet here it is flip flopped on this knob. Compared to the left direction, the right side resonance and/or the curve seems too much.
So less resonance on the right side per the utility numeric setting and maybe also a slightly more relaxed curve to right might work better. Left could maybe use a bit more resonance bite per utility setting but curve is probably fine. So whatever utility resonance number, add one or two to left and subtract that from right.
Pioneer, Rane, and Mackie seem to already strike a good balance. Arguably the DB4 has their filter resonance & curves kinda wanky, too. I want to say from memory the channel ones are similarly off to the current x1800 and the DB4 crossfader ones are the opposite.