It was developed by people fully aware of what orthogonality is, and understanding of why orthogonality is desirable. The fact that it is not perfect is indicative of the complexity of psychology and the bluntness of our tools. There is no system that is more orthogonal that explains near as much (I qualify it that way because dead vs alive is simple and pure but of little explanatory power).
We have nothing better than the Big Five (there are proposed refinements but they are not yet generally accepted), and it is better than what came before. The Big Five separates variables that used to be mixed, and can't yet explain the unexplained, but neither can any other system.
It was developed by people fully aware of what orthogonality is, and understanding of why orthogonality is desirable. The fact that it is not perfect is indicative of the complexity of psychology and the bluntness of our tools. There is no system that is more orthogonal that explains near as much (I qualify it that way because dead vs alive is simple and pure but of little explanatory power).
We have nothing better than the Big Five (there are proposed refinements but they are not yet generally accepted), and it is better than what came before. The Big Five separates variables that used to be mixed, and can't yet explain the unexplained, but neither can any other system.