However, the Great Scism was based on primarily one, albeit major, point of contention -- the primacy of the Pope. The Orthodox did not change the mass or seek to alter scripture in any way. In contrast, the Reformation not only abandoned many major doctrines, they invented new ones.
That's a worth while distinction.
(Though I'd footnote it that the filioque could be considered a slight change in doctrine. Certainly that's one of the matters currently considered by the joint orthodox-Catholic commision)
Still that's nothing like saying 'Dont baptise infants' or 'your saved by believing in written words alone'.