I hope it’s ok to mention that Affinity Publisher has been launched today. It’s an amazing DTP package, and as well as producing beautiful front matter, it can also import PDFs from Dorico as editable objects. (As can its sister app, Affinity Designer.)
If you want graphical elements in your scores, this is a useful stop-gap until Dorico can provide everything!
(I’m not affiliated: just a happy user.)