What exactly got reduced/ removed for plenary indulgences since 1968? Do you have specific examples?
The “Big Four” plenary opportunities (rosary, Stations, Adoration, and Scripture reading) are still in force, which covers 90 percent of what people do to earn plenaries, or at least covers 90 percent of what I do. People like Fr. Heilman and Susan Tassone constantly promote these as well.
It’s been my impression that the number of plenary indulgence opportunities has actually increased since 1968, because of the addition of Divine Mercy plenary indulgences and the addition of plenaries for various group events like the Week of Prayer for Christian Unity and the March for Life.
I agree with you that the lack of a current, unedited, English translation online of the current edition of the Enchiridion of Indulgences is a huge pain in the neck. For one thing, the current edition has had sections renumbered in a big way so it is impossible to refer someone to an appropriate numbered section using the old edition. However, I was not aware that plenary indulgences in force in 1968 were actually done away with some time between then and now.