Why the privacy in this years game?

On the field, you are not directly competing against 3 other teams. However with the way the ranking system is set up, each time you play a match you are indirectly playing against the high scores of every single robot at the competition. I would argue that this makes this year even more competitive than previous years, and anything that a team has that could set them apart from the rest is likely going to be held in high secrecy, because this year each point you make that the other teams don't make matters.