It would be incredibly powerful if we could use the 3ds max / vray libraries that we've built over the years in Enscape. It would solve the whole issue of entourage without Enscape having to resort to building a massive library like Lumion and Twinmotion.
Perhaps Enscape could use the recently released directcontext 3d api for Revit. It looks like you can display massive files in Revit without affecting the performance at all. That way we could actually see the objects in Revit, which would help out with exact placement. Placing could be very similar to placing sound objects in Enscape (using a generic placeholder family that links to a max file).