Yeah you're right, they should soften the constructions overall, they reveal too much and it goes a bit against the map constructs of older Diablos. They need to strike a balance between pathfinding and ambient. I think they almost got it in overworld areas, but underground needs a lot of work still.
Probably we'll get some new shoots from a new build when Blizzard has it's annual convention, but since this game is yet too far from it's release date, i'm not waiting for much yet.
Current PC Build
CPU - i7 8700K 3.7 GHz (4.7 GHz turbo) 6 cores OC'd to 5.2 GHz with Watercooling (Hydro Series H110i) | MB - Gigabyte Z370 HD3P ATX | Gigabyte GTX 1080ti Gaming OC BLACK 11G (1657 MHz Boost Core / 11010 MHz Memory) | RAM - Corsair DIMM 32GB DDR4, 2400 MHz | PSU - Corsair CX650M (80+ Bronze) 650W | Audio - Asus Essence STX II 7.1 | Monitor - Samsung U28E590D 4K UHD, Freesync, 1 ms, 60 Hz, 28"