The GUI is Cubase 9 is much better and workable. But this way of doing things in Resizeable and docking windows tec, needs to be taken further. For instance opening a lot of windows are still ‘normal’ windows, that can fall behind or in front of what you are doing (to me Cubase 9 has improved but it is not ALL windows that have improved, the main working windows are. The Cubase 9 look and feel and workflow is pretty good and mainly because of the lastest improvements in C9 GUI and workflow. Also Wavelab 9 improved. Halion 6 Improved a lot with the resize of the full windows and docking (i really like Halion 6 now). I have Groove Agent 4 but that is still stuck in old fashion. So really the improvements are there, but i suppose Steinberg will transfer and improve the new looks and feels futher more. Also if plugins would dock in a window and not are an extra window, it would help a lot. Mostly what i do not like is that windows that are open, suddenly disappear behind the others, thinking they are closed or just vanisched…
I have a Mackie Controller and it is very nice to see Cubase 9 switching windows by pushing or using the mackie buttons etc.