I think that goes against the spirit of the 5th edition. The basic idea is that House Diedne is a myth and a recurring theme, and that you can use House Diedne however you like. If you define it in core, that freedom goes away.
I think it would need options and possibilities, either to be used or as suggestions and ideas of how to build your own House Diedne. But of course Sub Rosa #13: The Thirteenth House Unearthed! did exactly that. Honestly I think that's the better place to do it.