@jrbroadway: Have you thought about View Templates?
Go into a floor plan that has the underlays cleaned up the way you want.
In the Project Browser, right click on that floorplan.
Choose: Create View Template From View...
Give the template a name.
You'll get a dialog box where you can choose what items of this new View Template you want to be applied to other floor plans/views when you apply this new View Template to it. If you want it included, keep the box checked. If you don't want it included, uncheck the box.
click OK.
Now that you have the View Template created, in the Project Browser, highlight the plans you want to apply the View Template to...
Right Click
Choose: Apply View Template...
The same dialog box will pop up and you can choose your newly created View Template.
Click Apply and this will apply the newly created View Template to the plans/views you selected.
If you want to see what View Templates you already have in your project, you can get to them on the View Tab> Graphics Panel> View Templates. There are default View Templates, but they're just a starting point for me.