Actually, the Gate and Compressor Q Width on the Key Filter is a narrow band, not wide.
What you are asking for is adjustable high and low pass filter option on the Gate and Comp sidechain. This is not the same as Key Filter.
You can certainly request it, but do note that changes to the DSP almost never happen so don't expect this on Series 3, but could definitely be an option on the next generation whenever that comes.