Ability to link to brokerage accounts to automatically import data. Either directly (eg IBKR) or through 3rd party.
To keep things as private as possible, server would use a public key encryption to secure the data package received and queue it in the project. Once user regularly logs in into the app, the package would be decrypted and imported in the background.
As such systems sometimes may be pretty wonky, user would be able to verify, fix or discard such imports using the same UI as current manual imports.