I would suggest to add Grid system at column bases and also create floor levels.
This would help us to isolate the grid views & floor levels during the time of geometric modelling.
I am glad to hear that you found this very good. My question though is for what purpose? Your idea is to have a gird that has what characteristics and what benefits should it offer? There is already a couple of grid tools (one in the Analytical Workflow and another in the Physical Workflow) that can be used to define parts of a model. What are you specifically looking for that these tools do not provide?
Grid Manager (As available in Steel AutoDrafter Workflow)
This Feature is found very Good for all the 3 Axes Views.
This has the basis of a nice idea. Are you thinking that you are looking to add the grids after you have created the model rather than as a framework to create you model? If so, what are you looking for the grid to assist you with? Are you thinking that it is used in the Steel AutoDrafter workflow because that is already done as the grids used for the drawings are created based on the model rather than the grids used to create the model.