Blender has one function I use heavily in a lot of designs
You can have two objects hard plastic and overmolded part but both objects use the same mesh input data.
adjust the mesh will update each object the same way
to expand an overmolded area I can select certain CVs and via an expand function make it grow.
this is how I use a lot of generative modeling tasks in Blender and it would be fantastic if Fusion could do something similar.
Currently I would have to work with individual TS objects which is ok but not very interactive.
https://drive.google.com/file/d/0Byzv_NlyKp_2eFBkMWxXMl9lQVk/view