We're proud of what we've built with Pairagraph v1, but the conversations are definitely limited by two things: (1) who is involved, and (2) the format: 2 authors, 4 installments, each 500 words, A-B-A-B.
I floated this idea in response to a different comment, but what if we allowed readers to vote on who they'd like to hear from in the future? Or what if we tweaked the format to allow more than 2 authors to participate in a conversation?
About the audience voting thing, personally I think a curated list of speakers is okay, and isn’t necessarily going to be any more biased than audience voting. I would just prefer that list is curated in a way that is 1) transparent in it’s biases and 2) represents my side a little better (selfish preference).
I know I already mentioned this, but be sure to widen your criteria for what makes someone an expert. I haven’t done an exhaustive search, but I don’t see many artists, teachers, union members, organizers, members of the working class, local politicians, etc. in your list, even though they often have more direct expertise related to these topics than an opinion columnist does.