Also using Parallels solely to access RB. 

To echo @viclin 's point - this is also a stumbling block for wider adoption of AW within my company. Operating in a seasonal industry, YoY, WoW, YTD, FYTD comparisons are essential to our reports. Having to export AW reports into Excel to achieve this, negates the the tools flexibility and feels like a glaring omission given the more advanced mathematical functions it offers.

Hi mfreestone, is there any update on this?

To echo the above comments - both metrics would add a great deal of value to the warehouse tool - please add!