@apprique
WooCommerce does not update itself automatically – if that has happened it’s a feature of your hosting that has been enabled. I suggest turning this off so you can do your own testing + backups before major updates.
> Changelog does not clearly show critical updates.
Actually there is an upgrade notice in the readme which displays on the ‘plugins’ screen before updating, and of course the major 2.x -> 3.x version increment infers this is major. We use SemVer.