Please note that according to Orthodox teaching an anathema or excommunication based on past Canons or past anathemas does not come into effect immediately when someone sins or falls into heretical beliefs...but only when a living Council of bishops puts into effect the anathema against certain people...
What is your basis for saying the above? Where is this found? What fathers or councils taught this? The Latins, who believe in created Grace, teach that the council has the power to withhold grace. The Orthodox who believe in uncreated Grace, teach that when someone falls into willful and public heresy, they are thereby separted from Christ since you cannot be in Christ and in that which opposes Christ at the same time. It is heresy that separates from Christ - not a council. There is no such thing as an un-Orthodox Orthdoox. Being Orthodox is not membership in an organization but union with Christ in the Holy Spirit through the truth of Christ in the Church. If I depart from that truth and embrace falsehood, I depart from Christ and His Church.
As to the teachings of various ones it is hard to know what their particular circumstances were and all that went into their decisions and how they would react today in light of all that has happened in more recent years. Also, just because something was permitted out of economia doesn't mean that now becomes the rule for us all. Also, even saints have fallen into error, not deliberate or intentional but through lack of awareness, or worse as with Origen or Augistine, or by being over trusting or for other reasons. Any teachings which contradict the Holy Scriptures or the consensus of the fathers in the councils must be rejected regardless of who said it. It is a known fact that Fr. Seraphim Rose very much changed his thinking in his later years and was becoming more ecumenical. Miracles are not to be trusted unless they confirm the clear and united teaching of the Church. Latins and Charismatics can all attest to miracles that support their beliefs. The antichrist will come with great miracles to decieve many.
We do not say that no one in world Orthodoxy has Grace. We say that whoever publicy teaches heresy has departed from Grace and we should flee for our lives from any communion with heresy. It is like we say that one must be baptized to be saved. Yet, we know there are circumstances where this may not hold. That doesn't mean we now teach that baptism is no longer necessary. We still say that you cannot be saved apart from baptism but we recognize special situations. So we say that grace departs where heresy is embraced but we do not thereby imply that everyone in world Orthodoxy is Graceless. But we dare not now say it doesn't matter. There is much confusion and ignorance and God's Grace does not act legalistically or against those who are seeking Him with sincere hearts. Even if those who have embraced heresy serve communion and it is merely an empty form, God could still impart Grace to the sincere souls who partake out of lack of knowledge or understanding.