here is my suggestion to GS to save the Pro if they stick with not changing the playfield, perspective graphic on the pf is not the best but better than nothing - gives you the idea.

ideal is have five lights in the white section with one lined up at each point which each one lights up when the path has been travelled then the fifth lights up when the mode is achieved but all the lights flicker giving the sensation of a spinning shield.

The shield can be located just ahead of the graphic on the pf and covering the ugly lane switch as well