I just happened to notice the LED on our robot this year and didn't know what it was.
People looked at me like I was crazy when I told them, but I swear I never noticed them before. Crazy I know, but I have always been able to keep track of who my team is against and who our allies are without any identification.
I haven't really paid much attention to the flags and lights. Maybe thats because I know the other robots really well; I don't know.
If I had my pick I'd definitely bring back the rotating lights. Yes they had their problems, but hey, they were cool
After all, aren't rotating lights meant to attract attention? Police, Ambulances, Firetrucks....