Reworking the Mixer UI
I know there's a lot of devs thinking about redesigning the Mixer UI. Here's my proposal. It reworks things to look more like Cubase/FL Studio while still retaining the features unique to Musescore.
Some of the bigger features:
An 'expand' toggle button that will show/hide parts with multiple voices (such as violins). When expanded, each part is given it's own slot in the mixer, just as it is now. When not expanded. a singe slot will control all the voices. So changing the volume of the 'Violin' will set the same value for the 'strings-tremolo' and 'strings-pizzicato' too.
Only the volume, pan, solo, mute and instrument name are shown on the main slider. Everything else is moved over to a 'details' panel. Clicking on a track will select it. When a mixer track is selected, the details panel will be loaded with the co-responding data to allow the user finer control.
Users will be able to assign a color to each part. This simply affects display and is for helping users keep track of the different parts.
A splitter panel will be used to separate the track side form the detail side so the user will be able to click and drag to resize the windows..