Those key command boxes are hard to read, and default to small, how about a med and large option that would make the text and box larger.
For split pages with mixer and key command, if using large key command ,then maybe a scroll bar appears for the key command portion to fit it all in.
Take a look at " actions" in itunes App Store, that the idea for large key command.
Also, please bring use key-switching ability for key command pads. 