After 10 days of using D5 Render Assets Models, I often have a need to change the same parameter in multiple selections. eg:
Parallax - Lighting, Intensity
Car models - Lights, Intensity, Color
Animated Models - Speed
Lights - On/Off, Intensity, Color
etc.
I understand that if we select mixed models it is not possible to expose all shared parameters but for the same type/family I think it will be very useful to have it in the Inspector.
Hope that makes sense to you.
Regards