Unfortunately, I can't give any feedback. I don't have a recent Macbook Pro and (considering the pricing strategy outside the US, the glued and proprietary parts, and the overall quality, e.g. keyboard) I don't plan to buy a new Macbook anytime soon.
BUT: I would like to appreciate your efforts done here! It looks great, especially with the dedicated icons, and I would wish that something like this is officially supported in future versions of macOS (either by Propellerheads, or at least as an official configuration option by Apple.
Keep up the great work!
Cheers