if you follow the development of this unit, it started out as a niche unit for RVs (Pun fully intended - a 12VDC unit to hide in a very small space in an RV.) When I asked about it, 5 years ago, Brian told me that a unit like that would be over $500, if it was a unit that he would have in his own home - otherwise HE would not sell it. He obviously kept it in his mind and came up with a small unit that would meet our needs.
HOWEVER, he asked for input to develop a unit that enough people would want, so it could sell enough to bring the price down. Over a period of several months (5?) this unit was spec'd on this website. Many features were added to make this THE BEST RECEIVER presently available to the hobbyist.
I do agree that RF challenges are evident. I have tried successfully ferrite beads, toroids, to reduce the rfi and also temp'd a copper window screen box in the cubby hole where the unit will go. With these, high power RF from HF, VHF and UHF ham transmitters have not seemed to bother the unit. The TV was wiped out a few times, but not through the receiver. My fan dipole ham antenna is only 3 feet above the cubby in my motor home
For break out, as you are asking, you sound like a DIY electronics person, so to build a custom box will probably be easy to do, and to really get what you want. Be sure to plan and use beads on all cables as you noted. I also added a short lead from screen room ground to the shell of my RG6 connector. That helped a BUNCH.
I also would like to see an internal header for the DIY to make it possible to add external modules / breakout boxes or for testing purposes, incorporated in a future production run. As Brian said, the investment in this PCB has been made...
And welcome to the forum. Thanks for investing in products from the colonies ;<) !!