I continue to use the traditional rulers of the signs. The modern planets of Neptune, Uranus and Pluto of course are still hugely important in astrology, however they represent partially the complexity of modern life. The fixed sign Aquarius is still Saturnian. When I think of Aquarius and its traditional ruler, Saturn, I think of the ideal Monarch, leader of a country or tribe of people. One who enforces boundaries and rules with an iron fist when necessary, but does so for the good of the whole tribe and protection of the people, remaining uncorrupted without any desires for selfish gain.
The assignment of the modern planets as rulers for the signs was questionable at best. I can read a chart to 100% accuracy only using the traditional planets. The modern planets of course have their uses but they are not the rulers. Vedic astrologers continue to mostly only use the 7 classical planets in astrology. I am a Western astrologer but many of my methods are similar to Vedic astrology. Western astrology is an entirely different system (from the Greeks) which comes up with similar results. It was never created to remain in alignment with the stars, Ptolemy was very clear about this in his work - "Tetrabiblos." Anyone who continues to perpetuate this myth has not studied astrology correctly. In my astrology courses I teach my students authentic astrology which is has not been contaminated by new age beliefs or by people who think that they know better than the ancient, Masters of astrology.