Allow Calculated Metrics As A Default Metric

The use of calculated metrics (specific conversion event / visit) is the most useful way to evaluate conversion variables and traffic sources. But we aren't able to use calculated metrics when setting default metrics for report suites. Can you change that so we can set business-specific, calculated metrics as default? We have 3 metrics available now so being able to select the following as default would make it easier to see highly relevant data.

• Visits as a denominator to compare raw traffic volume
• Conversion Event to compare raw conversion volume
• Conversions Per Visit to compare conversion rate