That's really helpful! I just checked on this and you need to enable 2FA as well:
"Health data can be stored in iCloud. End-to-end encryption for Health data requires iOS 12 or later and two-factor authentication. Otherwise, the user’s data is still encrypted in storage and transmission but isn’t encrypted end-to-end. After the user turns on two-factor authentication and updates to iOS 12 or later, the user’s health data is migrated to end-to-end encryption."
The sites are largely similar. Other than features that have changed, the major differences appear to be aesthetic.
I'm looking forward to the v3 release.