When applying a breakdown to Facebook there can often be many resulting rows that are completely unnecessary for our purposes. For example, actions that we'll never need to report on. At the ad-level this can be millions of wasted rows.
The Facebook API allows you to filter the query to specific actions, so I see no reason we shouldn't be able to take advantage of that. Please open up this functionality to your users.
If we have to write out the filter code, so be it. It doesn't need a pretty UI, just please allow us to add filters to the query.
Here's an example:
Out of 1,156 rows for this one account on a single day, only 70 of these rows are useful. That's 94% waste in what is our largest facebook table. In our business, this amounts to 2M-3M rows each month.