We can now indicate how an instrument was credited (very useful with "other instruments"), and how a person was credited on a release/recording. One thing in the same vein that would be useful is adding a way to specify a free text "credit" (either as a credit or an attribute) to relationships like "miscellaneous support" (e.g. "miscellaneous support [piano technician]: X") instead of having to keep that info in the annotation only.