The Price per kilo is pretty much the same as the Falcons and when you’re building it, you’ll realize why it’s worth the high price tag. It might be “just” a remake but that’s goes the same for the falcon. The new ISD improves upon the original in every way. More detail, less panel gaps, more proportionally accurate and most importantly imo, it’s more stable structurally so the bowing problem is non existent. As for the interior argument, and as someone who owns and built this set, I don’t see where they could have added one without compromising its backbone. And the reason the falcon has an interior in the first place is because it has so many famous and iconic scenes that took place in it. Coupled with the fact that the build plane/ area is mostly flat and parallel to the ground so the interior is much easier to implement. That cannot be said with the UCS ISD as the building plane/ technique is completely different and the technic backbone makes it impossible to add one in the first place with going through serious design changes. I think LEGO made the right call to have quality over quantity of features because I’ll rather have no bowing than a interior.