Calibre and other methods have proven mostly useless in producing Logos formatted docx files. I stopped using PB altogether because of how inconsistent results are. There is no feasible solution the doesn't require 800 steps and doesn't get good results anyway. (If there is some program I can use that I don't know about please tell me!)
I don't think FL will ever share it, but I can dream. I have a bunch on church history and ancient history in ebook or pdf format. I really want to put into Logos for highlighting, notes, concordance, and features which work with PBs.
It would be extraordinarily helpful, if FL were to do that.