I downloaded the update to SAP Design Studio this morning. See the SAP Help here: http://help.sap.com/boad
Now it has "Add CSV as a Data Source" feature:

But trying it against any CSV file will not work. See below:

The data will not load from the CSV as I used a CSV file without a metadata repository file.
So I locate a CSV file with the metadata repository and see below:

The aggregates are returned. I have to go to Edit > Initial View to add the characteristics/dimensions

The CSV feature is helpful for initial design and prototyping
Here is how the metadata repository file looks:

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