Save as copy
It would be nice to be able to save a copy of a file which wouldn't change the name or location of the current file.
This would be helpful when working with remote projects when you choose to not have version control on the remote host. Copies could be made to the local host where version control, and backups, would be managed.
An additional feature that could be added to the above feature would be to mirror the remote file with a local file. Basically when the remote file is saved the local copy would be updated/overwritten with a copy of the remote file.