Yes still pretty piss-poor. When you have really big constructions, things can get very laggy. With some buddy, we tried to replicate the Winterfell castle form Game of Thrones, and half-way through, after many many weeks spet, it got so laggy [I was getting sub-15 fps on an RTX 3090 and Ryzen 9 5950x) as soon as you entered the area that construction became too dangerous (jumping form laders in high towers would often result in death and then lost skills). And that was before any inside decorations were really made.

If they don't optimise the engine before release, that will probably stay a beautiful, but niche game.