Quicksight download spice datasets?

Quicksight has a nice menu driven function to join two tables on multiple keys, and to exclude fields and filter the data. But the saved datasets in SPICE cannot be downloaded. Can this feature be added by AWS? You can create a table visualization for download but the problem is that you have to manually add each field from the dataset to the table visualization one at a time - and the displayed order is alphabetical instead of the original dataset order. (This ordering could be another fix that would resolve the problem). Or is it possible to use a Quicksight API to fetch the data from SPICE? Other options?