I made a whole topic about this problem:
I tested 14 trial yesterday. Menus in the top bar look much better now, imo, and Halion’s right click menus are also pleasant to look at, with the new dark menus. But the Pool window is still the same white window, and the right click menus of other VSTs like Retrologue and Padshop are still the same, as before.
It looks like they are trying, but there is still some way to go. I am mostly annoyed that they roll out a new version of Cubase so shortly after the sale of their previous version. Instead of just being decent and let us have the newest version on sale, which apparently already was so close to release and which clearly still suffers from so many bugs, from what I’ve read.