>Within a password file i would keep important private notes, not a secure note, but the field within a password entry, i cant find if this field was encrypted or was it fully visible too in the hack?

On Last pass website, they are telling:
"LastPass Secure Notes is your personal Fort Knox notes app. Just like your Password Vault, Secure Notes is encrypted at the device-level, meaning personal data – Wi-Fi passcode, credit card info, password hints, and more – is protected from anyone who isn't you."

Meaning they are encrypted as well.