I noticed that ->sort is missing from the cursor. Seems like the old driver has more functionality.
[red.: The way how cursors are created is different between the drivers. In the old driver, the cursor would not be created until after the first rewind() call on the iterator.
In the new driver the cursor already exists. Because sort (and limit and skip) parameters need to be send to the server, they can not be called after the cursor already has been created.
You can use sort (and limit and skip) with the new driver as well, by specifying them as options to the Query as shown in this example: http://php.net/manual/en/mongodb-driver-query.construct.php#refsect1-mongodb-driver-query.construct-examples]