It seems plainly obvious that, apart from intricate word games and circumlocutions about how X isn't really magisterial because W, Y, Z, Church doctrine has changed. The current papacy has only shown a light more clearly on this fact.
Take the death penalty, by itself. The current catechism treats it as theoretically permissible but in practice almost never. Compare with medieval Christianity? They did it frequently, with the church's blessing. You're telling me that all of those people couldn't be kept in a dungeon for the rest of their lives? Couldn't be forced into servitude or something? Hogwash.
That people can be saved outside the church. If you went back to like, Pope Boniface and told him, "Oh yea, some prots and jews and buddists get to heaven too. That's what we decided you meant when you said that outside the church there is no salvation, cause, see, they're really inside the church, they just don't know it." He'd have flipped his pope hat.
Only by the most creative play of semantics can we pretend there is continuity of doctrine on all fronts in the church over the centuries. How long until doctrine "develops" to where this specific heresy of mine is no longer heretical? Sorry for the rant but I am just fed up with this. It's like you just put blinders on and say, "NO CHANGE NO CHANGE NO CHANGE!" over and over again while you sing cold play songs and receive communion in the hand from a priest who openly argues for gay marriage.