We ran all of our events before championship without using limelight at all. And at championship we used it roughly 50% of the time.
We only ever used it on lining up to the HP station, never to score.
So while I agree using limelight/vision tracking can speed up play, by no means is it needed to perform at a high level. Practice is the biggest thing which is likely what hurt 217 more. That as well as other mechanical issues they had; I know their one of their solenoids was locked for a match, and I heard they had other issues.
