I’m lost.
Weinandy accused Francis of “portraying doctrine as dead or lifeless.”
mjm said he was not accusing, but affirming Church teaching that doctrine does not change.
Then a number of people affirmed that doctrine changes. Against Weinandy? Against the Pope? Against mjm?

My impression is that Weinandy did accuse the Pope of saying doctrine is dead and lifeless, though it had nothing to do with the development of doctrine. Mjm made that connection, suggesting dead and lifeless= eternal and unchanging. Everyone other than mjm believes doctrine develops, including Weinandy and Francis.