I know it's not exactly what you were looking for since you still get the fps dip from just having the regions on your screen, but it makes a pretty big difference in playability when you try to rotate the camera around.
The two important things are:
- Don't make your frame a child of the nameplate
- Hide the frame before you reposition it and show it afterwards
Also I have no idea why this works, so that's probably something to investigate.