Any movement analysis system must address the question of whether or not two trained observers can see the same thing. LMA stands up to this test.
Over the course of my career, I have been involved in various inter-observer agreement tests. From the Laban/Bartenieff Institute’s Concensus Project, a study conducted by Dr. Martha Davis in the early 1980s, to more recent studies conducted by Brenda Connors, Dr. Tim Colton, and Dr. Richard Rende in this century, LMA has proven to be reliable tool for decoding movement parameters of many sorts. In my own practice as a Movement Pattern Analyst, I have found the system to be a solid empirical tool.
So I will stick with Laban Movement Analysis for its track record of naturalistic evolution, parsimony, elegance, and empirical practicality.