Good summary, but if you actually ask most RC or EO what they believe they can't answer you. That's because these churches are defined by a common tradition and culture rather than theology. "Protestantism", which you ought to understand if you're going to critique, is an act of drawing boundaries by theology. It's nearly a useless term now but it initially referred to three different branches of disagreement with rome: anabaptist, calvinist, and Lutheran. Notice Anglican is not included. When most people say protestant what they really mean is "American spiritualism", or nondenominational/heretical franchise "churches" with no real theology.