PM Commission Reporting - Pro-Rate Option

Given the updates to the PM Statement, I am finding a void on mid-month forecasting on my commissions earned.  The Commission Detail report could be a solution, but it would need to offer the option to select "stay dates within selected period" to allow for pro-rated commissions.  Without that update, I am operating a bit blind.  I understand the need to update the Owner Statements functionality, just do not understand why that had to spill into the PM reporting too.