I gave the lightning a shot with and without chasis equiped on both a flat and bumby circuit and i can confirm that traction, acceleration and reverse are significantly better. I like the reduction in slope sliding very much. It felt more glued to the slope than before. The lightning feels heavier overall, like it has more gravity applied to it. Most likely a side effect of the traction improvment. The loss of drifting potential, particularly when using the racer chasis is unfortunate, but inconsequential as it is more fun than practical. However, the improvments came with a nasty side effect of increasing significantly the chance of flipping the lightning on it top. The racer chasis exacerbates this even more. The slightest bump (moving on and off a road), rock or tree root taken at an unoptimal angle will have an imaginary boot kick the underside of the lighning at the back and flip it (high front flip potential). This "flipability" was not as problematic before the update. This ought to be addressed as losing your tank to a small rock is infinitely more frustrating than sliding down a slope you should have been able to climb.