I don't quite understand the touchpad thing. Does it do more than just control music? It seems odd to me to be included on the CP.
Do you have a coin door? If not, you might want coin buttons.
Are you locked in to the size and shape of the CP? As mentioned, its a lot of real estate for what you need for controls. You could probably clip the CP width by 8-12 inches.
Also as mentioned...the power button. I'd suggest moving that off the CP altogether. If not, kids will push it on purpose, adults will push it by accident.
BTW, is this a pedestal build?