i agree.
In my opinion, when they came up with the new data format (OPVault), they should have made some kind of in-app notification/workflow to let people automatically convert to this new format.
Nobody reads all release notes, it's impossible. If you're not a computer nerd, you're using the old format forever.
I've also complained about this on their blog at the time.
By the way, the fact that not "everything" is encrypted is - sadly - also stated on their website: https://support.1password.com/opvault-design/
> The Agile Keychain kept some information (most notably Location and Title) unencrypted so that these could be used to search for or identify a particular item, while the more sensitive content could remain encrypted. With the Agile Keychain format, the browser extensions could identify and list potential matches for a website without having to be “unlocked”. With the OPVault format, we have moved away from that. The user must unlock the data with their Master Password before they can see a list of Logins.