It’s like the hammer of Hephaestus himself was put to work on the entire armory.
A large number of its upgrades have been cut and replaced with new effects.
I count eight new upgrades with six being removed.

The Witch’s Staff and the whirligig wound-making of the Umbral Flames seem to be the most affected here.
But also: pow!
As is often the case with Supergiant patches, there are a lot of small but significant changes.
Individually they seem minor but altogether they constitute a big ol' update.
Very importantly, there is some extra dialogue for when you speak to your pet frog.
“More voice lines should play when confiding in Frinos in certain contexts,” the notes say.
you could read thefull list of changes here.