It would be nice to be able to add references for a patent and clinical trial by their number and for a web link as well.
Also maybe it would be nice to paste just a link to the paper on the journal site, so Paperpile would figure out the reference from that.
Also, it would be nice (when entering manuscripts manually) to have an option to add “submitted” and “accepted for publication” , maybe as a check box. Right now, I just add this to the year: “2016, submitted”