3 x 3is possible. The red + blue = purple could be as said a combined score between red and blue. Being that there have been multiplier's the last 2 years the purple could be a multiplier of the red and blue teams individual scores. This would make it easier for the audience to figure out, no doubling the losers score idea and no one trying to knock over the other teams multiplier. The center is out clue (which I still believe is real) would but scoring zones on each side of the field. This would give spectators a closer view and open up the middle for more robots.
I believe that the if you look closely refers to an infared emitter that will be enclosed in something with only a small opening. This would prevent a lot of the bouncing light to disappear and therefore easier to home in on. Big bonus at the beginning of the game for autonomous mode that would be equal to the hanging at the end last year.
My 2 cents, take it or leave it.
