All this said...there's no need for us to recapitulate the disagreements between EO and the Reformed Faith here. It's all been done before. Here's a helpful article outlining some of the main criticisms that Protestant/Reformed would have of Orthodoxy: [A Calvinist Looks at Orthodoxy](https://www.opc.org/new_horizons/calvinist_on_orthodoxy.html).

But if/since you were in a Reformed church for 18 years (I would be curious, which one?), then I doubt any of these disagreements are news to you. Scripture exhorts us to grow in our understanding, grow in the grace and knowledge of Christ, the Holy Spirit is given to lead us into a fuller understanding of the truth, we are told to move from the milk to the meat, he has given us the many "helps" of pastors and teachers for two thousands of years in order for us to grow, learn, refine, etc. -- as the article (rightly, I think) states, the EO remains "undeveloped" and I would add, gently, immature. It avoids questions and doctrines that the Scriptures (namely, Paul) mark as essential (i.e., original sin, sovereign electing grace, Justification by Grace Alone through Faith Alone, etc.).

We would do well to hear the Word of God on these matters.