remove required label from page property report macro

Since cql was introduced, a lot of macros rely on cql-conditions. The page property report macro does as well. A powerful tool was introduced with cql to express conditions. Though I can use a lot of diverse data to describe filtering I am still forced to use a label - even if I have other structural data like metadata by Communardo for example.
It would be sufficient just to rely on metadatasets, but I am forced to make sure that metadatasets and labels are adressing the same pages. I have two structural criterias describing the same content.

If the label wouldn't be necessary to make page property report output a list then it would decrease a lot of effort to synchronize and double our information architecture.

Please make parameter label not required or better allow free use of cql to to describe content whose page properties have to be shown.