Hey @Ryan_Bruni !
Thank you for clarifying! If you create those calculated fields in the QuickSight analysis, as long as the fields remain the same from the CUR or any other data source, your calculations should come back correctly.
For example, the data flow to QuickSight would be the same, but instead of applying the operator function on your target metric in Athena, you create it on your CUR analysis in QuickSight and then publish your dashboard. The data will feed into QuickSight unchanged, but your calculated fields will replace the metric in the analysis, does that make sense?