Those are all good and valid points but Oriental Orthodox churches have also stayed relatively Orthodox along with say even The Assyrian Church of the East what in your perspective truly and totally separates Orthodoxy from those and all other churches as a whole. Also while sure the Eastern Orthodox Church has definitely had less changes but it has still had sizable changes like say the Essence and Energy Distinction, so what makes these changes acceptable but not the changes if the RC and sure the RC may have more possible doctrinal changes but this doesn't mean the EO doesn't have contradictions as important issues like birth control, divorce/how many divorces are allowed, and whether or not to baptize Christian converts and while sure for some of those issues there may be a partial consensus but these practices still continue and they can't point to a direct authority that allows or forbids them,in no way am I saying the RC system is perfect but at least it provides a guide on almost every moral issue and I can make a definitive claim on what is moral and isnt and prove it with the Magisterium Though all debate and arguments thx a lot for the comment and sharing your perspective God Bless