I have been aware that the 37 volumes of the Ante-Nicene; Nicene and Post-Nicene Fathers is not the last word on the works of the Church Fathers ... some texts were omitted for space reasons, and, I believe, more manuscripts are now available.
Recently I discovered this great web-site which collects together the material missing from the 37 volumes. See http://www.earlychristianwritings.com/fathers/index.html.
Wouldn't it be good if Logos integrated this material into the existing 37 volumes ... making a truly great product ... one that was much better than anything available in print. Perhaps a Pre-Pub upgrade offer could be made to guage interest, although the popularity of the Church Father's products seems to guarantee that it will be a sure winner.