I've made my best so as to update the wiki adding links back and forth to the multiple pages on the subject, but this would definitively need some clean-up...
In order to leverage the burden on your guys, best would be to have an official list of boards tested by the dev team plus a link to an additional list of board known to work (tested by dRonin users) just like what we've got in the "Deals & Sale" post.
Official list would be in the "Documentation" website, while the "known to work" should be much more flexible: either a wiki page or maybe a dedicated forum tag? There are more questions about loading dRonin than navigation after-all.
0/ We should highlights which boards do come with a dRonin compatible bootloader and which boards will require to flash the bootloader. Someone new to this hobby should be advised to start with a board from the "official list" already loaded with a compatible bootloader.
1/ The GCS does lack connection diagram for all board. Sparky & PikoBLX are missing the nice help screen we've got for the Seppuku. I am not saying the GCS must be updated with all possible diagrams, but It would be nice to have a diagram for all the official boards and at the end of the diagram a note specifying that if the board is not like in the diagram, the user should go to the forum/wiki and find info on the corresponding clone (eg: AirbotF4 diagram is vastly different from the Revolution).
2/ More generally speaking, my mates come to dRonin because they failed to tune the betaflight PIDs. So most users do already have betaflight loaded and need a clear "how to migrate from betaflight". I've made my best in the Wiki, but this should be included in the "getting started" page.