Hey, Welcome to the club!
AFAIK, Snow Mode retards throttle response so you don't put too much power to the wheel. It also probably cuts back engine output faster when wheel spin is detected, but I can't really test this in the tropics. Maybe someone in the north can fill us in.
You find the QX50 more "pure" ? I found the CX-7 a lot more engaging and fun, but at the same time I had my CX-7 heavily modified, with the suspension completely non-stock.

So I guess it's like comparing apples and oranges.
I do find the "deadness" of feedback from the rear a little unsettling. In the CX-7 I could feel the road/vibrations coming from the rear, the QX50 has this floatiness to it during hard turns. I'm assuming this is due to the brake-based torque vectoring* (?). I find it artificial feeling. It works though, but the missing feedback is something I haven't gotten used to yet. *I could be wrong about the brake-based torque vectoring and it might actually have a full blown rear LSD. I haven't really looked into the nitty gritty on this car. I had my fill of modifying cars with the CX-7. Too many custom one-off parts = breaking the bank, esepcially on an "SUV". XD
But on the flipside, if I didn't already know the steering was drive-by-wire, I would had thought the QX50 had some form of mechanical steering linkage. There's not as much feedback as a car with true mechanical steering control, but it fools most people.