Shayanadi Avasthas - are they worth learning?

For predictions Deeptaadi are very important and Lajjitaadi Avasthas are very important esecially for predicting the antardasa. Shayanandi are important for predicting the maha dasa but as it has the most general connotations, they are not nearly as important as Lajjitaadi. 

Yes

Most astrologers just use deeptaadi. Most classical vedic astrology books only mention deeptaadi. Just adding Lajjitaadi adds so much more to your tool box.