Dunno why zanz really seems to nerf all cards that are very used. Sundial, then Lava Golem, Hourglass, Steal... If this becomes true, it will be really frustrating.
Why people use Quanta Towers? Because there arent other decent quanta sources, that can encourage mono / duo decks, period. The answer is not make rainbow weaker, its already weak enough, because its slow, in PvP environment. A lot of FG can defeat rainbow, because its simply nothing without the hourglasses, and more and more FG are based on permanent destruction. There is even a FG based on Black Hole. I would really like to know what really troubles zanz about rainbow being used. Why doesnt he create cards that encourage other decks instead?