Greetings in that Divine and Most Precious Name of Our Lord and Savior Jesus Christ!
We Baptists and other Evangelicals have liberty to think about what we believe. But it seems to me that you Orthodox are committed to a system which a priori has all the answers to religious questions.
Haha!! How can the Church of the Divine
Mysteries also have all the answers?
What about speaking in tongues?
You mean translating texts and prayers into different languages? Yeah, we got that

divine healing?
You mean like the the Divine Mystery of the Anointing of the Sick and the constant prayers during the Divine Liturgy dedicated to the sick? Yeah, we got that

Should Christrians observe the sabbath?
You mean like when we go to the Divine Liturgy and drink blessed win and consume blessed bread just like the Jewish Shabat mimics to this day? Yeah we got that

should they tithe?
Of course, who doesn't?
Will there be a millennium, after Christ's return?
There is debate about this in the Church, the Revelations is written in very mystical and esoteric language. Our fathers tend to prefer to connect the symbolism and imagery of the Revelations to the routine celebrations of the Divine Liturgy rather then speculating about a specific sequence of prophetic events.e
Is there a secret rapture?\
No.
What about believers' or infant baptism?
Yes, we have "believers' baptism in the sense of what the fathers call Baptism by Blood also known as the Crown of Martyrdom. As to Infant Baptism, yeah we got that

predestination?
What about free will?
the place, if any, of free will
So why are you talking about predestination then?
or human response in soteriology?
That is complicated, the Fathers applied a theological term to describe this gradual process, its called Synergy which leads to Theosis.
May women preach?
Depends on the circumstance.
Can a Christian lose his salvation?
That is debatable.
Is scripture inerrant in the Fundamentalist sense?
No, that is naively superstitious and a bit too hokey even for us as gaudy and anachronistic as we tend to be

If not, what do we make of divine inspiration?
See SYNERGY
I am not talking about wild, unbridled individualism which ignores the core of Nicene, Chalcydonian Christianity and strikes out in imagined and isolated self-sufficiency, of some personal 'sola scriptura' which discards what all others have thought before; I am thinking of mainstream Christians who, in mutual acceptance, seriously and sincerely consider these and other issues and come to a clutch of beliefs which, no doubt as the years pass, will evolve and change whilst still remaining within the mainstream.
There is no way to affirm the Creed or to read the Scriptures accurately and in the same breath completely and utterly defy and disrespect the Apostolic authority and continuity of the Holy Spirit which gave life to these in the first place. Outside of the Church, the raw Tradition (which in the Orthodox ontology equally includes the Scriptures as synonymous) is confusing and empty.
Surely you Orthodox must have such questions in your minds. How do you deal with them, both individually and one with another?
Yes, of course we do, after all, we have thousands of years of thinking to sort out, however we also have been taught by the Fathers unique observation of the human condition that we are fractured, broken. Our minds are not exactly reliable, neither are our feelings and emotions. Rather, we must follow the spirit of worship and developing a spiritual relationship with God through the core and depth of our being. It is God first, questions second. Then when we have specific questions we have an age old adage that is as valuable is it is campy and cliched, "Ask your priest."

stay blessed,
habte selassie