Dear Friends,
Jyotish is full of fear-mongering about saturn (wrongly, of course). I have written two articles on the web to try and counter that kind of "doom and gloom" thinking that sticks to the ancient craft, sadly even today!
http://www.boloji.com/astro/00331.htm
http://www.boloji.com/astro/00317.htm
Anyway, the point is simple. Whether following the tropical or sidereal zodiac (tropical astrology vs jyotish, for instance) regardless of the 'field' (signs) changing, the planets are the same! Think about that for a second. And since the planets are the same, their inherent nature must be identical between tropical and sidereal astrology. If this is not the case then there is a serious flaw in Astro-logic, won't you agree?
While similarities do exist, particularly in traditional western astrological descriptors for saturn (Ptolemy to Alan Leo or thereabouts) and in classical jyotish literature, the perspective about saturn has changed in modern times in the field of tropical astrology. This has been attributed to the move away from the 'doom and gloom' version of hundreds of years ago, as well as the entry of well-educated and intellectually sophisticated individuals with scientific and psychological backgrounds (Jungian, Humanistic, and other backgrounds), as well as a deliberate move away from the traditional astrology which was not serving well or being well-served in modern developed capitalistic industrial western societies.
It almost seems that saturn (and all other planets) have evolved, as the society did! But really, perhaps human being is now more capable of utilizing the immense potential of the inherent capabilities of the planets to bring the descriptors more in tune with their developmental level.
This is not a value judgment or pointing fingers at differences between different societies which are all just right where they are and where they should be.
Indeed classical jyotish texts were perhaps hinting at the changing perspective and meanings of astrological principles when they with uncanny foresight insisted that when reading a horoscope and applying astrology principle, due attention must be given to the 'societal' conditions, times (period of time) and surroundings and attributes of the individual nativity. The very same combination, perhaps they meant, would lead to different conclusions appropriate for the individual in a given stage/period and surroundings. In other words astrological rules must not be applied from a look-up table (if saturn is in 10th house,,, etc etc), nor must ever be treated as black and white.
Rohiniranjan