This isn't a solution to your problem, but you could easily create a script in the Workflow app that would have similar functionality.
EDIT:
There. I did it for you. This workflow, when run on iOS, will create a new note in Evernote with a title based on your current calendar event. If there is no current event, then it'll use the current location as the title.
https://workflow.is/workflows/06eb9e79be4f4025ab859a634fec66c5