It seems Heavy 2 and Heavy 3 on Kerillians one-handed sword were swapped. Performing 3 heavy attacks in a row used to be overhead -> overhead -> swipe (as seen here at 30 seconds:
https://youtu.be/l9_Yh5VlSB0?t=30 and as suggested by the stats in Armory:
Performing 3 subsequent heavy attacks now results in overhead -> swipe -> overhead.
I could not find any documentation on this change.