I think the above offers a somewhat truncated perspective, as if all the lies, errors and superstition that dominated the European landscape for the previous 1000 years from which the holy Spirit, through those reformers, was wrenching the people free from, was of no consequence. Truth in the form of theological doctrine had been trampled into the dust and cast to the wind by decades of religious perversion and we cannot expect that the reformers, who had been taught and inculcated by those lies within the very institution they had been brought up to revere and love, to all suddenly come to a united 'eureka' moment and all agree on what constituted true Biblical doctrine. So sure, there was always going to be the 'human element' that inhibited growth and obscured revelation, but let us not cast off what was accomplished by those courageous men of God just because they didn't get it all right, nor should we minimise their hugely positive effect on the religious landscape simply because their followers got bogged down in disputes and sectarian squabbling. After all, wasn't that what they had been taught to do? Banish, hunt down, excommunicate, ostracise, torture, and kill all who disagreed with the status quo? God gave them grace, and I think we ought to as well.
What the world has been given and what we witness today in the world's churches may not be doctrinally perfect, but it is potential and opportunity...freedom...which in medieval Europe was a very rare commodity. We have a plethora of Bibles available, and regardless of the version we favour, God is able to guide people to Himself through those inspired pages which in the dark ages was near nigh impossible. People in those days of servitude to religious bigotry and prejudice, depended on blind priests and prelates for guidance, and they all together fell into the ditch.
Those reformers dragged people out of that ditch by their courage and determination to stand up to the hatred and vindictiveness of Rome, showing the people that the Bible and the Bible only was the only standard of faith and practice that needed to be observed. Thus Protestantism grew and flourished, and but for the concerted efforts of the Jesuits within the context of the counter reformation, the Papacy would have bled and died.
It is not time now to abandon those principles which the reformers rediscovered, but to gather them together and place them in their true light. No, we are not saved by doctrine, and that is not I believe what the reformers were suggesting. They were rediscovering truths that had lain buried for 1000 years, and those truths, not as separate sectarian pet beliefs, but truths united as a whole in leading people to the Holy of Holies, were leading people to Christ, Who then became the peoples' salvation. It is not through the union of churches that we come to Christ, but through the union of those truths that the Papacy had opposed and distorted and hidden, which when brought to the light, led people away from superstition, to the light of the gospel, and the way to salvation.