ALL cars with normal (spring based, non active) suspension designs "tilt" in turns. The question is "how much".
The front is a totally conventional MacPherson arrangement with antiroll bar. The rear deDion axle has no antiroll bar, but the roll center (the point at which body-roll-inducing forces act) is at the height of the chassis end of the links at the back that locate the axle side-to-side, and that's pretty high up.
The deDion axle, in general, is not a bad way to support the back end of a car like this. It keeps the tires straight up relative to the ground no matter what the bodyshell does above it. There is NO independent suspension that can do this! It doesn't have the bad side effects of a traditional rear axle drive car in which there is a heavy differential bouncing around up and down back there. The unsprung weight is little different from IRS. All that is "good".
The "bad" things about the standard suspension are generally that the springs are too soft, the dampers are hard, and there is not enough upward travel in bump, particularly at the front, which leads to the front hitting the bump stops a lot. Higher-rate springs would reduce bottoming and reduce the pitching during acceleration, braking, and turning. I'm sure there will be a price paid in normal ride quality when you are rolling straight down the road.
The other "bad" thing about the rear suspension has to do with those lateral links at the back. Essentially, this suspension design binds up when it goes too far away from its "design" ride height. The lateral links swing in an arc which wants to pull the back ends of the U-shaped axle tube inwards towards each other. To accommodate this, either the bushings have to flex some (which means the back end of the axle isn't located laterally very stiffly ... bad) or the axle itself has to bend (which pulls the wheels into toe-out, particularly on rebound ... bad). I've had the car get unsettled when going over a sharp crest. It makes sense. This unloads the suspension, which pulls the wheels a little into toe-out, and the arc that the links swing in "steers" the rear axle a bit, and that adds up to the back end getting squirrelly.
If you look at the rear suspension design, the center pivot of those arms is higher than the axle ends. Lowering the rear of the car by an inch or so would put them close to level which ought to reduce the axle-steering and binding effects, in addition to lowering the overall center of gravity a smidge ... it's on my wish list ...
As for the next generation model,
When they jump it off the one-side ramp, when the car lands, the rear wheels stay upright (obviously after the one that jumped off the ground lands again) and that means it's using an axle of some sort, since no independent design can do this.
BUT ... I'm hoping that they locate the axle differently to give better geometry. There are a couple of spots where if you stop the video, you can get a (blurry) view of the undercarriage, and I'm not seeing those lateral links, which suggests that it might be a different design. Getting those links out of there would free up some room, too.
