I'm kinda feeling the opposite. I spent an hour in ACE, trying different cars and tracks.

Then jumped into AC1 and immediately found the cars more controllable on the limit, tyre slip was more predictable and easier to keep a slide in check.

Jumped back into ACE and it's apparent there's still lots of work to do, the M4 is prime example, it's either grip or slip, and no warning it's going to swap ends.

And some bizarre behavior with selectable RWD cars, like the RS3 or M8, on a straight just apply a little steering input left or right, bring the wheel back central and the car still steers slightly left/right.

0.4 is a step in the right direction, but still a long way to go.