@ Paul R > The DDJ-T1 is a software controller. Therefore it controls Traktor and uses the Traktor Mixer built in to the software. I agree, and I have noticed the mixer in Traktor sounds different than a hardware mixer such as a DJM-800.
I have never known Traktor to have a setting to change the actual frequency parameters for the mixer. There is the possibility to change the "Mixer Type" and you should give each of those types a try to see what sounds most accurate. I'm referring to version 1 as I haven't tested version 2 for more than 3 minutes. But I would assume Traktor would not have changed this much and there would still not be an option to actually alter the parameters directly.
I don't believe something like that would be changed in a small update to the software. That would most likely be a major update to the software.
Unfortunately I think you're best option is to try the different "Mixer Type"'s and pick the one you think sounds most accurate. But maybe someone else has some info that could help as I haven't tried V2 much at all.
You're tech talk is fine mate, don't be so hard on yourself. lol