Calculated metrics in data warehouse

It would be useful to be able to create calculated metrics in the data warehouse, or at least to be able to use in the data warehouse the calculated metrics you built in the analysis workspace. 

For instance this feature would, among other things, allow you to customize the attribution model by which the metrics that you use in your reports are calculated. 

As long as this feature isn't implemented you are stuck using the "last touch" attribution model.