Hi David,
Your question is timely. The ability to merge dependencies as you suggest in not available in the most recent version of SyncroSim (2.0.44). However, we are currently working on this feature and it should be available in an upcoming version of SyncroSim 2.1.X a couple of releases from now. In the meantime, when a scenario property is defined in multiple dependency scenarios, the scenario that is higher up in the dependency tree is the only one that will be used at runtime. The “Data Sources” tab is always a quick way to find the source scenario for each scenario property.
Regards,
Leonardo