To celebrate the new year, I have released two new userscripts which should help you to add spoken vocals and copyright relationships faster. These are also teasers for the features which are still to come: Partially automated parsing of plain text credits and importing of (all) relationships from other sites like Discogs.
As a bonus I have finally released a few bookmarklets which I have been using for a while now and which had been buried in my (formerly private) feature branch for the above userscripts: