I have been working with the STPA viewpoint for some time. I think it is a great addition to Capella capabilities. I have also come across the work of the Adaptive project, in Europe (FP7) where they used a layered STPA approach that, in my perspective, traverses the Operational, to System, to Logical layers.
It would be interesting to be able to do this with the STPA add-on, establishing these different layers?
ref: Folie 1 (zhaw.ch)
ref: (2) (PDF) A Systematic Approach Based on STPA for Developing a Dependable Architecture for Fully Automated Driving Vehicles (researchgate.net)
Another related point is having nested controllers. I am thinking if we could have… somehow… the result bellow, in which hiding the nested controllers would lead to second view… probably not that simple, has you can have control/feedback specific to the aggregate and not in any of its constituent controllers…
Finally, exporting to HTML would be fantastic… but maybe that means some work with the XHTML add-on?