We upgraded to Google Analytics Enhanced Ecommerce a few months ago, but there doesn't seem to be a way to compare Product Category Performance to previous years (when we didn't have Enhanced Ecommerce).
While you can compare revenue, there's no category data. The new dimension is called Product Category (Enhanced Ecommerce) vs Product Category before so I can see why you probably can't compare, but it seems like a huge omission and this is how we run our business.
Is there an easy workaround to get this data without pulling all data manually and comparing offline?
Is this a feature that's being worked on?
I also posted in the product forum but got response: https://productforums.google.com/forum/#!topic/analytics/Pu6L7WAko9g.