When sending items, the ability to lock them behind a password would be nice. I know that these documents can be made available in the client portal, but we all know how difficult it can be to get them to use it. Occasionally, there's some items I could send via email, but I don't because the generated share isn't password protected.
In the meantime, I've been sending encrypted documents (those have their own issues) and using other services to send items and have them password protected. Having that integrated here seems like a very useful feature.