Rome's position is all over the map and remains unclear. Are you saying that Bishop Fellay did not admit that he had changed HIS position?
If you mean doctrinally, Columba, then yes, I think Bishop Fellay has not changed his doctrinal position. If you think otherwise, tell me with regard to what doctrine his position has changed?
This is the portion of His Excellency's speech that I would hope would be quoted by those who wish to criticize him, in the interest of fairness, "In our talks with Rome, they clearly said that to mean there would be a right to error or right to choose each one his religion is false". Then he talked about persecution of the Church in the middle east and said the problem is not about the freedom that is asked, but about which principle is invoked to do it. All of this does not strike me as coming from a doctrinally indifferent Bishop.
He had said religious tolerance is the traditional teaching and still says it. He had said there is no right to error and still says it. What he did say is that Rome is now openly admitting it as opposed to several decades when they did not.
Those who have followed this matter from the start will know that wasn't always the case. When Archbishop Lefebvre respectfully asked a similar question of the Pope, of whether there is a right to error, the answer was, "Ah, this is not the time for theology". That's why doctrinal discussion were a precondition to regularization, and the Society's general chapter has reiterated a similar condition going ahead while not ruling out canonical normalization.