should have ordered bigger tires. Bet that would have helped, even with the exact same tire, just bigger. Puts more rubber and weight down to the road, the smaller the tire, the harder it will be to keep all 4 wheels firmly planted on the ground. Remember its a 4200+ lb vehicle, the bigger the tire, the better it will be.
i have never sliden sideways in my jeep around any corners, even in heavy rain.
Erroneous on both counts! (Wedding Crashers quote, not trying to be a jerk

).
but really, that's not true most of the time. On dry pavement, the more surface contact, the better. So, yes, you'd be correct. On water, there's a point of diminishing return as a wider tire has a better tendancy of hydroplaning. So, a super wide tire is going to hydroplane easier than a 235 or 245. Additionally, a 245 is going to stop better than say, a road bicycle width

That's what I mean by a point of diminishing return. Start very thin, wet stopping power will get better and better the wider you go... you'll hit a nice optimum point, and then it'll drop off - like a bell curve.
Additionally, it doesn't "put more weight down to the road". Weight is constant. A 215 and a 285 will hold the same weight as the vehicle's a constant. The difference is pressure - weight per unit of area. A 215 will actually have more weight per square inch than a 285.
Mud, snow, water - a thinner tire is a little better. Sand, dry pavement, hard packed dry surfaces - wider is better.
My $.02 deposited.