When we have architecture and structure in separate Revit models we end up with somewhat clumsy graphics in wall sections. This is more pronounced if the structural slab is in the structure model only. It could look like this.
The wall continues past the floor as if it isn't there. One possible solution that allows us to keep the structural slab in the separate file and avoids the copy/monitor scenario is to place a Reveal on the interior side of the wall. The profile needs to be equivalent in size to the slab thickness and the wall thickness (inside surface plus however far the slab extends toward the exterior). This approach creates a bit better result.
I should mention that this works the other direction too, since the reveal is part of the wall it will leave a "hollow" space for the structural model's floor slab to occupy.