Yep, that about sums it up.
I didn’t build the system =)
But with sculpting models you’re only moving vertices, that’s why after sculpting a high poly model you go through the fun of making another low poly model / retopologize. That won’t be feasible for the landscape, especially since you don’t want any popping when changing the LoD. The landscape changes the poly count fluently during LoD transition. But yeah, it would be great in this situation if epic would store the heightmap also in 32 bit and then make some button to change the min max range of the 16 bit heightmap. Cause every time you rescale your 16 bit heighmap, you loose some information due to precision, therefore you should choose your min max height of the landscape at the beginning.