Correct me if this is the intended look.
The quick settings panel's edge radius starts at 0px during the pulldown animation. Typically it matches the radius of the device border. You can test for yourself if you slowly just barely pull down the QS panel and there you can see that the curvature is not there.
Second: The top bar's icons such as the time, battery wifi notifications etc. are lower than they are usually on aosp. It might be due to upstream changes, but i think they should be a bit higher (and potentially more to the side as well) so they dont "waste" that much space with the padding.