Right now, you can boost the price paid for minerals up, but you can not drop the price of minerals. Since raising the payouts raises the amount of crowns in the ocean, boosting has to be *very expensive* or the game would become unbalanced.
What if, you could raise the payout of one mineral while lowering another by the same amount? That would be just a payout shift, so it wouldn't cause any more crowns to be paid out to players. this means that the cost of doing a price shift could be *much* lower, maybe only 1%-10% the cost of raising just one mineral payout.