reduce the size of the RC icon in the title bar to reduce the size of the title bar
The new icon take a lot of space, which makes the title bar bigger. I think the size of the icon should be smaller to have more space for the code.
I think it is great to have moved the quick lauch to the title bar which make great use of that empty space and make it possible to hide the menu via extension without impacting the quick launch.
also, there is a gray rectangle next to all toolboxes and under "find results", output, ... Once again, it takes space. I think it can be good to have some kind of separation between the different elements of the list of toolboxes, but I think it would be better to add a | between them of alternating two colors (light gray and normal gray) or something like that. I heard that it will be possible to customize the look of visual studio with custom theme, I think that would be something good to include in the theming.