The first one has been implemented in Plesk AFAIK.
A good idea if that can also be implemented here as well.
Yes, they have it as part of WP Toolkit, Would be good to see it introduced here!
There's the backup feature, but it's not one click, and that why I put end-user usability in brackets, it's only goal is to make it easier for those not familiar with DA or a search button to do what they need to without making a ticket.It is already there,
When you logged in as user its literally 1 button to backup and restore you can even choose what to backup or restore
Even adding a backup button in the WordPress Manager and linking it there might be an idea, But something that'll let them make and restore backups from the wp-manager section would be a good addition in my eyes, Only have contents and db instead of everything else in the backup section and make it easy and quick.