I have always understood that the Faith is unchanged in its essence even if the details develop over time. For example, Christians have always believed in the Holy Trinity and that Christ is both God and Man but, through the ecumenical councils and prayer and study the Church has become more precise in its dogma in response to false understandings of those Truths. The same with Liturgy: it has been more or less elaborate through the centuries based on many factors but in essence it has always been formal, liturgical and eucharistic in essence.
As a former Protestant, I can agree that "the Protestants are more right than wrong on many things" They are right in everything they hold in common with the ancient Faith, they are wrong on the those things they invented (albeit sincerely) at their founding.
Tom suggested that Orthodoxy or Death should "learn to fish", I think saying that he should go find books that deal with the evolution of doctrine and that he shouldn't just read Orthodox Apologists because they have an agenda. Yes, everyone has an agenda (or, a point of view). The authors of dooks dealing with the development of dogma from an "evolutionary" rather than a "revelatory" point-of-reference have an agenda too. They wish to show that those who believe God has revealed Himself and His Truths through the historic Church are really just following the teachings of men. So these men would have us follow their teachings instead.
As Orthodox Christians we have enough to do if we simply study what we need to live holy lives according to the Faith. Why should we engage in a potentially prideful and spiritually dangerous exercise in seeking out books that undermine our confidence in the very Faith which we are trying to practice?
God Bless,
David