My chief objection to Barth on this and on other points is that unlike even John Calvin, he disregarded the role of tradition or church history in formulating his “neo-orthodox” Church Dogmatics.
As a member of a “paleo-Orthodox” church I would say was a futile exercise, because
The Exact Exposition of the Orthodox Faith by St. John of Damascus, written in the eighth century, covers the same ground as
Church Dogmatics but does this in 75,000-100,000 words, slightly more if you include the entire Font of Knowledge including the Philosophical Canons and the heresiological treatises on Iconoclasm, Nestorianism, Islam and so on, whereas Church Dogmatics is around 6 million words long, in German, and will expand to more words in other languages which have less of a tendency to compound words together.
Indeed when you compare the length of Church Dogmatics to Calvin’s Institutes or the Summa, well, I really hope Dr. Barth was using a typewriter, because otherwise, ouch. Indeed the high cost of books likely contributed to the brevity of
The Exact Exposition of the Orthodox Faith, which was meant to convey in one volume material previously addressed only partially by different volumes such as
De Incarnatione by St. Athanasius, the
Conferences of St. John Cassian and so on, or in a less comprehensive manner, for example, by
De Fide (On the Faith) by St. Epiphanios of Cyprus, which is a brief summation of Orthodox theology compared to the various heretical sects of the first, second, third and fourth centuries that he catalogued in the rest of his work, the
Panarion* (Medicine Chest, or as I would translate it, First Aid Kit), of which
De Fide is the coda.
Indeed I would argue that for Calvinists, Barth was reinventing the wheel versus the Institutes of John Calvin in the same way that for Roman Catholics, one could argue that later systematic theologies reinvented the wheel of St. Thomas Aquinas. This is not to say all new works of systematic or dogmatic theology are wrong; the early Church Fathers organize their thoughts in a manner which can be, as pointed out by Metropolitan Kallistos Ware, alien to the modern reader, and thus somewhat disorienting, and obviously there is a need for volumes arranged in a modern manner, hence the still very concise works such as
Orthodox Dogmatic Theology by Protopresbyter Michael Pomazansky, a favorite of mine, or another favorite of mine,
Mere Christianity by CS Lewis.
That being said, I am grateful for one thing, and that is, that by starting from the Scriptural text alone, Karl Barth did manage, in 13 volumes, to validate several essential church doctrines and disprove certain false doctrines advocated by the Restorationists, yet also insofar as he and other Calvinists who did the same thing nonetheless disagree on certain key points, also managed to prove the need for tradition as means of ensuring harmony with the Apostolic
Kerygma.
I would also like to thank my pious and excellent Roman Catholic friend
@Xeno.of.athens for his useful and comprehensive replies to the OP, which were intelligent, concise and offered in a spirit of helpfulness.
*All of which would be regarded as heretical on CF.com, for they consist of incontrovertibly wrong belief systems like Manichaenism, Marcionism, Docetism, Valentinism,