Published corrections/changes to the current version of the PDF.
One exception is the new Medical Kit (heals a Wound during a Field Rest). This campaign doesn't have any way to heal wounds except time & class abilities / magic.
Combat Rules
Spells
Equipment
Ancestries & Backgrounds
These are mostly clarifications where the source book says things are optional or up to the GM, but also a few homebrew additions to make room for player improv / creativity:
Nimble 5E Clarifications and Homebrew