It would be nice to develop in visualarq the possibility to combine parameters between them to obtain a new output automatic parameters
e.g. Aero-illuminating ratio parameter => area of window / area of a space
This is planned for VisualARQ 3. For example the weight of a beam by creating a parameter that does something like: this.volume * DENSITY.
However your example requires that spaces have data about the openings on them, which is currently not possible, and is a different feature.
I will add your vote for both so we can let you know when they are available!