It would be really helpful if you could manual set a time for a project i.e 23.59pm (or any time you want) every day, that creates a backup of the project in your dashboard.
We look after a few clients sites but they also have access to the Editor. As there is currently no manual save options in the Editor side (also would be super handy). But if we haven't gone into the project for a few days but the client has made many amends and then makes a mistake and asks for it to be restored, as our backup is 3 days prior, they will lose lots of work.
This would be a great selling point, saying we offer daily backups, and could avert or minimise the damage of loss.
Ideally though a save in the Editor before you/the client does anything in the Editor is key.