I think this is a simple suggestion.
Once you’ve given a pilot their ILS clearance or VIS/GPS the flight strip information on the right turns GREEN.
This could also be expanded for aircraft that are tuned to your freq and haven’t confirmed their approach request. Once they have asked for a specific request it could turn Amber…
Little bit like a traffic light system.
RED - Not requested an approach
AMBER - Approach requested
GREEN - Cleared for their requested Approach
What are peoples thoughts?