IPM Forecast Bias cube slice definition issue

Summary:

When selecting the Forecast Bias Insight , when you come to define the Historical Forecast Cube slice definition, the member selector design allow for relationship functions. Every selection can only be a hard member reference. The other Insight types are fine.

At the moment this is making the use of this feature slightly demo ware - as a customer wanting to utilise this will want to track forecast bias out in the business (So lev 0 Cost Centre or Division, Lev 0 Account etc). Currently this would mean hundreds of insights needing to be created

Is anyone else seeing this?