Command-line needs to stay there, especially that it seems like it is zero effort solution and for many people, it will be a better way to navigate in Rhino forever. However, I don’t mind custom menus for many commands with one-click, easy to access user-defined settings for the command, some intuitive sliders, etc.
I only saw Mac UI in some videos but it is enough to say that screen space utilization is sometimes not the best. I hate when I got to work on the 17-inch screen of my windows laptop (normally I use 27 1440p monitor) and I wonder how uncomfortable it is to work on e.g. 15-inch mac book, especially with Grasshopper window on the side.
Take a look:
This popup could be (should be) twice smaller.
Another thing is monochromatic, thin line icons of layers, properties, display, etc. They may look attractive, but they are not eye-popping enough. They need to be visible without even looking at them to quickly switch between them.
The general goal should be to provide maximum docking freedom in all bars and panels so the user can have as many buttons / informations visible all the time and use maximum space for the viewports.
Please, get rid of unused / half-used bars going through the whole screen!
I even started a thread about it some time ago.