That is very good to hear about V6 plans. It sounds like a massive undertaking. Below is a link that might give some hints on a possible direction or features.
I haven’t used it yet, but am looking forward to it. From what I’ve read you define a plane and direction for the view, create a bounding volume that defines which items near the plane are also shown in the view, and then there is the ability to add and subtract items from that bounding volume.
These should not be available in model space, only in detail views. So a detail view has a position in model space as part of its definition. This is a variation on section tools, which was neat, but not particularly user friendly or intuitive.
+1 for vector output of drawings.