Bhairitu, It appears that Joni Patry was originally a western astrologer who learned jyotish later. So, now she is integrating her western astrology knowledge with jyotish analysis. There are a few American astrologers who are doing this type of work, such as David Frawley, Dennis Harness, Brendan Feeley and Dennis Flaherty.
However, one does get some very interesting insights using western astrology as taught by Santos Bonacci in his videos called, "Prisca Theologia". In particular, his points relating to syncretism is very a propo in understanding the western culture, history and the Judeo-Christian religions. Having said that, yes, you're correct in saying that Pluto is no longer considered a planet. But a tradition has been established in western astrology to determine its meaning and signification in context with astrological analysis. Nonetheless, I personally don't use it as you can get the same results using the 9 grahas recognized in jyotish.
