I would like to see a little more mystery surrounding these. I think with the butler notification it takes away much of the 'mystery and puzzle' aspect of the Rook Attack.
From a computer standpoint, I think that with the butler saying it, it brings a lot of people who know nothing about rook attacks to the street and causes so much lag you can't even enjoy the attack.
I would like to see either multiple rook attacks at the same time, in the hopes to divide and conquer the players and ease the servers for each street or for butlers to not announce them unless someone reaches a certain skill? Perhaps throw in a rook calling skill or something.
Just a few thoughts.