I think going back more than 50 years to legitimize the garbage these ladies are into is giving them way too much credit. They sound like New Age yahoos, nothing more.
Much of what has become New Age yahooism has origins dating back to Blavatsky. There is also some connection between her racial philosophies and those of Adolf Hitler.
The bitch gets around.
“New Age” was actually “Old Age.” That garbage has been around since forever.
In the US during the 19th century, it particularly proliferated, because most average people were Protestants and many of them were not very closely attached to a church and often relied on occasional traveling revivals to get them going again. Then they would take it and run with it.
On the other hand, “intellectuals,” particularly the growing female middle class and blue-stocking class, sought out more exotic things...such as séances and spiritualism.
Mormonism came out of this environment, and so did Christian Science and a number of other even stranger 19th century cults. In Europe, the zeitgeist gave birth to anthroposophy, probably one of its more benign manifestations, and also to a number of crank cults.
The Catholic Church, in theory, was proof against these things. But laxity and timidity on the part of the bishops let Satan creep in and take over the weak minded, such as these sisters.
And as for “feminism,” I think they might actually have been slapped back...if they had not been female. The bishops were simultaneously scared of women and their media potential, and condescending to them (particularly to sisters) and didn’t expect them to be bright enough to be orthodox anyway. So no demands were made.
And then there were the numerous heretical or quasi-heretical VII bishops...but that’s another story.