Although the metric shows an improved correlation with human judgment of translation quality (Callison-Burch et al., 2007;Giménez and Màrquez, 2007;Callison-Burch et al., 2008;Giménez and Màrquez, 2008), it is not commonly used in large-scale MT evaluation campaigns, perhaps due to its high time cost and/or the difficulty of interpreting its score because of its highly complex combination of many heterogenous types of features.
note that the feature based representations of semantic roles used in these aggregate metrics do not actually capture the structural predicate-argument relations.