Just wait for traffic to clear up a bit. The roads being slick will actually make testing easier since you'll be able to break traction more easily. You may get some wheel hop on the slick roads though, so watch out for that. If the drivetrain starts to shudder or violently shake, back off the throttle immediately. You don't want to break anything. You shouldn't get much wheel hop, if any, at stock power levels but it can still happen on slick roads. And yes, the power loss in 1st and 2nd is completely gone on my car. Even when not launching or already moving I've got full power available with no cuts.
I don't want to be out there at all, really. It's snowing in NC, after all. So that means get in your truck, lock the center like an idiot, and slide around drunk on ice with your headlights off. No thank you. I'll stay inside with my hot chocolate and anime, and throw a snowball at a tree every now and again. ?
I'm not likely to ever want to "launch" the car. It's not really my thing.
Of more interest to me is being able to keep those wheels spinning and use the throttle to manage them. The more direct, the better. The perpetual annoyance of having power robbed when I'm just trying to get the darn thing moving quickly would be nice to see minimized, as well. Forget drag racing; that's just plain madness-inducing all around, especially on an engine that already has a turbocharger.
It did occur to me this afternoon that if all this nonsense was just on a switch, it would be a damned convenient "winter mode" for when you're feeling lazy. They could have turned that into a whole marketing venture, because combined, these features do indeed "idiot proof" the car in a way that almost seems ideal for such weather. It's the sort of thing Saab might have developed if they were still around. From that perspective, and from the perspective of just having a lazy shopping trip when it's slushy out, it would be a great system.
I can't wait to test this out tomorrow.