You're absolutely right, Petri, with regards to creating a floorplan symbol and layerlinking it ...
But the fact remains that layer linking either; a floorplan design or, it's symbol, won't show the contents of this 'linked layer', in the model layer, and that's the problem.
I was to try avoiding, copy-pasting on every floor, searching for alternate working methods...
It just seems that, I'll HAVE to paste a physical copy of the floorplan on each individual layer, so that it may appear in the model view.