This thread is 5 years old, so just wondering whether there's been any update since...
I've been a Apple/Mac enthusiast since the 80's, but the mouse tracking is the one thing I really like about Windows compared to Macs. I cant stand moving my mouse on the Macs because of the variable trackingit slows down too fast. I even bought the new track pad for my new iMac specifically because it seemed to move (and stay) faster than the mouse (both being on the same fastest setting).
I understand that maybe it would help with fine-grained pixel editing or similar needs, but for everyday use of general applications, variable tracking isnt necessary, at least not for me. I really, really wish there was a way to turn off the variable tracking.