See the thing is that design, like a lot of things, is dependant upon the preferences of the beholder. I have to say that I do not agree with you. Taking the mixer as an example, in Cubase 6 was more 3d however was not fully scale-able. I would far rather be able to adjust to fit the screen that the 2 scales available in 6. I happen to like it simple and uncluttered. If this is your main complaint about Cubase you are doing better than a lot of users.
I am far keener to be getting on with the music than be distracted by a cluttered background. Perhaps you need to make more music and ponder the screen less.
My only complaint about the font is that it is too small.
You know I am a bit fed up with all the retro designed software that makes it look as though it is a refugee from the 50’s or 60’s. Not that some of them don’t look nice. However, I would much rather the individuality of the FabFilter approach.
You obviously have not spent time in a Pro Tools environment, or else for your own protection you have erased it from your memory.
For all it’s faults, and there do seem to be a few at the moment, Cubase is a far more comprehensive program than its competitors in nearly all respects. “If” Steinberg can deliver us solutions to the main problems it is facing it will be unbeatable. Unfortunately Steinberg does have a habit of shooting itself in the foot.