I have also been thinking about the tools and menus in inkscape. I also think gimp is a good model in the way they manage tabs, which is very understandable.

I can make a document with some thoughts and suggestions that detail possible improvements to the user experience. I do a lot of mock ups and wireframes in my job and I am happy to create some detailed ones for inkscape. If doing that is welcome, I can work on it and submit through a new topic.

Inkscape has a ton of great features, but knowing how to get to them or navigate the UI is not always clear.

we
need more space on the toolbox because it not fit into my monitor size.

Is not the only tool that have this problem and when the program grow
the problem become bigger. Also because the lack of space we need to
compress the widgets and make hard to undertand. The cuestion:

¿What about removing this toolbar by a tool dialog in the right like
for example Gimp, that autoupdate controls between tool changes?
This give "unlimited" size to expand tools. Also I'm in favor of a
expander at the end of this dialog for advanced users or not all day
use features.