I drove my Commander (QD II, 5.7L, Wrangler SilentArmor tires) in snow and slush up in Flagstaff last winter. It handled like a dream. I never had it slide one bit and it always went exactly the direction which I pointed it. Granted, with the Hemi you have to have half a brain and not mash on the gas when it's slippery out... but with normal sane driving it handles beautifully.
I wouldn't turn off the ESP in snow unless you find yourself stuck somewhere.
If you are running the stock Fortera's you should consider changing out your tires for something that has a bit more grip. Either the Wrangler SilentArmor's or the Fortera TripleTred's are going to be the best Goodyear tire for snow. The SilentArmor's are the best Goodyear tire for all surfaces on-road and off. I am sure other manufacturers make a good all surface tire too.