For ANY Apostolic to accuse a Protestant, especially a Reformed one, of taking power from Christ is the ULTIMATE of Chutzpah. It is your belief system that transfers supernatural powers away from God and puts them into the hands of men. A FEW examples are forgiveness of sins, "salvation" through the Church, small group infallibility (in your case --- one-man infallibility for the RCs), and efficacious prayers to Mary and the rest of the Saints (all humans who are no longer physically alive). You believe all these things are BY humans, alive or dead. We believe all of them usurp God's sovereign domain, the very basis of your accusation against us.
While I would agree that the Orthodox are not as deep in error as the Roman Catholics on this, you still have ZERO standing to accuse us of taking power from Christ. A fundamental definition of our faith is giving ALL power to God. It is you who fervently reject that idea.