:-) The HF daughterboard is the only thing that's missing, I think. To be honest, I was hoping for someone to suggest a nice design on that front.
Here is a render of the enclosure (work in progress): https://i.imgur.com/AEYgLxU.png
And of course we agree on the software side! Soapy + GNURadio are a must. Hopefully my driver-writing skills are up to the challenge!
and 3rd would be on the software side: support in Soapy and GNURadio (osmosdr) but I guess that would eventually come from the community.
This is exciting, and as supporter of previous open source SDR projects, I'm looking forward to more updates and news from you.