Precisely.No doctrine was changed in the text.However an irrational theology was used.With this theology the dogma extra ecclesiam nulla salus which is a foundation dogma for other doctrine( ecumenism etc) was discarded.
The theology was based on a false premise and conclusion.It was accepted by the magisterium and the traditionalists.
In this way Vatican Council has changed doctrine for all in general- but not for me. I avoid the false premise and conclusion. I do not use the theology to interpret any magisterial document.-Lionel Andrades