I created quite a few works over the last weeks. The functions for batch-create new works and batch-add a relationship to works are helpful. But for adding ISWC and other work attributes (IDs from ASCAP, BMI, GEMA) it is still necessary to edit every single work.
A solution would be a script like the one used for ISRC (http://notlob.eu/isrc/). This would also help to reduce the copy & paste mistakes (a problem I was struggling with). Unfortunately I don't know how to write a script, so maybe some of the experts around here could help me.