I am a big fan of Files and promoted it between my iProducts user friends, because of the many features and easyness of handling it has.
I noticed some other apps can access the PDFs indexes which opens as an independent box on the screen, allowing the reader to browse through the items and jump directly to another section if needed.
I would like to see this feature added to Files family.
Direct print will also make a great addition.
Thanks and good work guys !