Hi there :)
As an old user, just thought MuseScore's next version could have a re-designed interface and took the personal liberty of unleashing the imagination and designing some possible previews, where the palettes are a lil bit less space-consuming and more stylized.
Here are some examples:
of course, this is just a suggestion, and version 3 was practically just released so it's Gonna take some time to do that next version we've never haaad! , and it isn't perfect/complete –i may have not thought of everything– and it would imply element rearrange, aand... sorry if i offended with my ideas ":l
but i liked the icons after all, :v
Just thought of leaving it here in the forum for the developer team's consideration, as written in the website's 'Contribute' page, "to help shape the software's future design" :)