Yeah I'll second this and I'm sure many others will too. I like my sensitivity to be the same in KF2 as it is in CSGO because I use custom mouse acceleration and need that consistency. My sensitivity of 2 in CSGO comes out at fractionally over 8 in KF2 according to that website that does the conversions, which does feel about right. Probably most of you converting a sensitivity from another game won't be so lucky though and will need to punch a horrible decimal figure into the config and then check it once in a while to make sure the GUI hasn't rounded it back...
CSGO allows you to tweak your sensitivity up to 2 decimal places in the GUI and I'm sure that would be just perfect for everyone in KF2 as well!