IMHO in regards to the mixer UI be it SONAR Cubese, Reefer, Pfffttools, whatevertools,
they're all UGLY as hell.
I hate software (UI) mixers because it's sorta like looking at a restricted view port with one eye whilst the one-arm/finger pointer salute'er painstakingly teeters with a mouse; one slider/dial at a time.... oh what joy, oh what fun,
But of course a surface (mixer) controller helps and better still if money can afford a much much larger 128 chn {dream on} but anyway....
I mix as I work (track) and usually know where levels need to be, in fact I spend most of my time in track view + inspector.
I much prefer
hardware mixers and most likely because I started out using them when I was very young. I would take them apart to customized them and put them together again, literally learned from inside and out; getting the most use out of of them. Over the decades I became so fond of hardware mixers possibly to the point of developing a fetish like kinky relationship with hardware mixers but with therapy and medication I have it all under control!! {I think} anyway...
I had a careful look at the new Cubese 7, and yes it's ugly as a starving dawg on heat;
. the mixer does hightlight (shade lighter) for the strip you are working on as most daws do,
. and the actual tools available at hand are all very nice but...
. what I see as a problem is the gradient gray background; as it gets darker it gets harder to read the black text.
. Overall, one of the main things I hate about software mixers are; lots and lots of tiny it'sy bit'sy little fonts and dials
There are some very nice features in C7 but some of those features had already long been available in other dawgs although I'm sure Cubese users will welcome the new dawg whereas I don't give a rats patoooteee about it... the darn mixer. But to be fair; I would most probably like the chn strip, user-setups/save and search functions.
Now about those intelligent Chord and Harmonizer features. I think those features might be very useful for some who welcome writing assistance of that form and it might also ease writers block.