Invisible statuses would be great. They would allow you to:
◘ Hide passive stat gain statuses from the UI, to prevent visual bloat.
◘ Use aura statuses as a "detection" trigger.
◘ Use statuses as a visual, or timed flag.
◘ Attach scripted talent behavior to statuses and hide them for better immersion.
I hope adding the ability to hide statuses is something Larian can add down the road.