Unlock two accounts with one password

Actually I have to say, I like this approach much more. From a security point of view, I always disliked 1Password to open all accounts and vaults at once.
So biggest error which can happen is my personal misbehavior. So if I leave the desk, missing to lock 1Password, a person sneaking by, could immediately steal all passwords from all open accounts.

This is no longer possible now that you need to re-authenticate by account.

Now it's also possible to move certain vaults to another account and have a second layer of security (expensive though, to pay another subscription just to separate 5-10 items …)

But agreed: at least having the option for people wanting to take the risk, would be a good move.