I don't want to speak for the down-voters (I'm not one of them and I think your comment is was a valuable contribution), but when I first saw AD integration requests I assumed that people wanted AD managed Kerberos authentication to 1Password for Teams; and so imagined delegating 1Password for Teams authentication and authorization to a third entity.

Don't get me wrong. I love Kerberos. And in very early planning stages we looked at it quite a bit. But Kerberos is only about authentication. We need client derived encryption keys as well as authentication tokens to achieve our security goals of end-to-end encryption.