I just tested the latest beta, (and release candidate) with various IDML-files I have and I am very happy of the improvements!
Even the radius mismatch of the rounded corners was corrected. For me, the values are now right.
What is NOT right, is if you have different corner SHAPES, please see screenshots:
IDML:
Publisher:
AfPub changed all corners to the same style, rounded, although I originally had only 2 corners rounded.