Why not try to play your mono deck with quantum pillars instead of your pillars - see how overpowered they really are.
Can't you make the simple math that quantum gives 3 mana for 12 elements, so what you get is 0.25 from each element each turn. Your regular pillars gives you a whooping 1 element every turn, and not only that, but it server as a mini-nova with the extra 1 mana from the tower version.
If you want the keep crying - blame the all the colorful cards in game, because this is rainbows power.