New Mixer and Piano Design

Hello, I am not a programmer or software designer, just an excited Musescore user.
I welcome the changes and adjustments Tantacrul has already made to the design.
I know that in the past there has been a lot of discussion about the mixer UI, but I still don't like the mixer.
So I tried to draw something new. It's just an idea that certainly needs to be improved, but maybe it's a start to rework the mixer again.

The piano could also be given a more beautiful look.