Dear Sir, I so wish I could better answer your questions. Religiously speaking I am somewhere between an infant and toddler at best. I'm happy to share my limited insight and perception though. Keeping in mind it is without authority, nor qualifications to do so, ok?
First let me clarify that Protestants in my perception do not consider themselves as 'one Church' divided over disagreements of theology, though in many cases that is how division happened. As it stands now I would say each denomination is more of a separate 'Church' kind of like Orthodox and the RCC are separate. Consider this: Theologically speaking in some ways I would consider the Church I currently pray at more in line with Orthodoxy than 'modern' Methodist for example, and far closer than Calvinist or Evangelical Protestants. It is simply not possible to give an all inclusive answer to your very legitimate questions.
With all that being said, some reject more Oral Tradition than others. My perception as I have been learning is that the only Oral Traditions that should be completely rejected are that which cannot be confirmed through scripture, yes realizing scripture originally comes from The Church. Ex: Am I correct that the Immaculate Conception, and purgatory, has no Scriptural basis nor was it Oral Tradition prior to The Holy Bible being written? If so, that is why it is rejected. Notice how I start off with the clear cut easy ones I believe we would agree with.
It is prudent for me to remember Martin Luther was not as much objecting to Orthodoxy but the RCC. I may be showing my ignorance as Martin Luther may have had objections to Orthodoxy as well that I am not aware of yet.
As for The Cannons and Tradition that did exist prior to written Scripture that may be rejected by some, many, or all, or how the Church is trusted for Scripture but not necessarily everything else? My knowledge is simply too weak to answer confidently. I feel comfortable enough to say that in some cases though it is not a matter of rejecting Tradition, but simply not seeing some aspects as necessary to salvation or finding God, thus accepted but not practiced. I almost think to some extent that one reason The Church is subordinate to Scripture, though that Scripture comes from the Church, (quite the paradox I’m working with no?) has to do with what I earlier mentioned as an understandable knee jerk reaction. Could this have resulted in Protestants striping down Christianity to a core, rejecting everything that is not substantiated by Scripture, (yes, even though Scripture comes from the Church itself), and only applying what is deemed as necessary to faith and salvation in an attempt to protect oneself from the contamination of man? Until my knowledge reaches a point to learn otherwise I think that is a fair possibility. One of the first prayers I heard in an Orthodox sermon (on line) that I still repeat often goes; 'Lord God let me see You more clearly, past the misconceptions of man, but for who You truly are.' Clearly that prayer and sermon was written for us Protestants!
Are we foolish to believe in Saints but not see it as necessary to pray to them? If Icons are a reminder of those that paved the way before us (oversimplification I realize) is it dangerous to think that The Cross in our Church or the one I keep in my pocket is sufficient to do the same? To be honest and fair we should ask ourselves how much ‘fullness’ is being missed though. Not long ago it would have been easy to excuse crossing ones self as an unnecessary physical act. Now that I have learned just a little of Christian Ontology, the connection between our mind, body, and soul, and only now learning of the ‘mysticism’ of the desert Fathers it might not be ‘necessary’ but I would hardly consider it merely a ritualistic physical action either.
Now that I have taken so much of your time without really answering any of your (our) questions allow me to make a personal ‘southern’ note of interest. My daughter recently moved to western N.C. I was truly amazed to see three Orthodox Churches in her immediate area. There are a couple Methodist, Presbyterian, a Nazarene I think, and more Baptist Crosses on the Google map than I could count. She has not visited the Orthodox nor could we find an ‘old school’ Wesleyan, but praise God she did find one she is comfortable at and has been attending.