I don't know if I will be a on-field coach this year, but if I am I will not be using any scoreing aid.
The reason is because I don't believe the coach needs one, nor do I believe it's the coaches job to be a scorekeeper. I believe that the coach should be assessing the capabilities of the robots on the field (both allied and opposing) as well as assessing the strategy being used by the opponents.
There will be a myrid of strategies used in this game (and in this thread I have not seen my teams strategy
), and each will have to be assessed quickly and play modified to adapt to those strategies. That is the job of the coach, IMHO.