My thoughts are that our spiritual lives should be guided by an Orthodox spiritual father, not by our own intellectual brilliance. While "praying the rosary" is not criticised by Orthodoxy (to the best of my knowledge), like the West's "tradition" of Ash Wednesday, it is not a spiritual exercise or practice that developed or is practiced within Orthodox Christianity. Thus, how could the spiritual benefits of the practice accrue to the faithful Orthodox, whose spiritual lives are nourished and grow within the life of the Orthodox Church? I would suggest, with the approval of and under the guidance of a spiritual father, trying the practice of praying the Jesus Prayer, with the traditional prayer rope, which I think would be somewhat analogous to the Rosary. I am not condemning the rosary, it's just that it isn't within Orthodox tradition, thus, an innovation, something that is not within an Orthodox Christian's humble perview to initiate.
Somewhat of a frame of reference for me in these matters, is some guidance Metropolitan Maximos of Pittsburgh offerred to me many years ago. During the procession of the Cross within the Great Friday Reading of the 12 Passion Gospels service, at the suggestion of my parish priest at the time, from within the Sacristy, I would use a hammer and knock against a block of wood, mimicking the sound of nailing Christ to the Cross. In a social gathering which was a part of our Metropolis Assembly, during Bright Week, a local priest prompted me to apprise His Eminence of this "practice." His Eminence admonished me, if we wanted to, we could sit together and come up with all sort of dramatic practices to enhance the services, but we don't do that, all we have is our holy tradition which our church teaches we must adhere to.