Disclaimer: I was raised (pre-V2) Roman Catholic. I was chrismated in an Orthodox parish in 1984, and despite the fact that I still have my grandparents' rosaries and treasure them, I no longer pray the rosary.
The fact is, my spiritual father and my priest have told me to NOT use it. Are they also getting "bent out of shape"? There is obviously truth in the rosary, just as there is truth in many evangelical practices. As I asked before, why not incorporate some evangelical practices as well? And while we're at it, if truth is the measure of things, then we can also incorporate the devotional practices of some non-Christian faiths since there is varying degrees of truth in them as well. There's truth in the Catholic service of the Stations of the Cross. Shall we now attend these as well?
I am going to start by replying to what you said, but then take off from there. Please don't assume that anything is directed personally at you, and if I offend, I beg forgiveness.
If I still prayed the rosary, and if my father confessor said I should not, I would cease. There's very little point in having a spiritual father if we are not going to take his advice, after all. However, and I say this gently, I feel the rest of your argument is a bit over the top. How can we compare pious devotion to the Theotokos to "the devotional practices of some non-Christian faiths"?
I have prayed alongside men and women outside abortion clinics, as they prayed the rosary. How can one judge the prayers of these devout, Christians who pray for the unborn? Should I, and the other Orthodox with me, including clergy, be reprimanded for praying with Catholics because they prayed the rosary? Or should we rather pray with our Catholic brethren that the lives of the unborn will be saved, and be glad that they are with us, down on their knees, praying the rosary for the lives of the innocent unborn?
If more Roman Catholics prayed the rosary and were as devout as these, the world would be a better place. I have serious trouble trying to judge devotions such as the rosary as "not Orthodox," particularly when the objections are not theological, but relate to whether we should or should not visualize something during prayer.
Certainly, if someone had proposed that perhaps Catholics who had recently become Orthodox might not pray the rosary in order to become more fully Orthodox, I would probably agree. But that's a different question, is it not? And after 25 years of being an Orthodox Christian, I have yet to see a convincing argument that there is any fundamental, theological distinction between Catholic and Orthodox devotion to the Theotokos.
I am not, by any measure, an ecumenist. I do not, however, think much of attempts to distance ourselves in any way possible from Roman Catholics, solely out of antagonism (and I hate to repeat chestnuts, but I never run into this in real life, just online).
I did not become Orthodox as an anti-Catholic statement. I became Orthodox because God showed me where the Church is. I became Orthodox to be a part of the fullness of Christ's church. I see a lot of anti-Catholicism, however, and shake my head and move on. The prayer of St Ephraim is not just a liturgical convention. I know many pious, devout Catholics, some of them in my extended family, and no, they are not Orthodox, but the world needs more Christians like them, and God knows, many of them are better Christians than I. I would never counsel anyone to stop praying the rosary.
Lord Jesus Christ, only Son of God, have mercy on me, a sinner!