The general color for the big buttons should be a configuration option. Not that they're bad but, you know. Also when a button is "active" sometimes the intensity difference isn't so great. This is a bigger problem on the performance preset buttons where it's a bit hard to pick out which one is active. Maybe allowing a totally different color for active.
One thing I do is use several presets at one time selectively ... sort of merging different looks together in an ad hoc way. It would be interesting to see if there was a way to have something like "latched" buttons where they stay on until you press them again to go off. When pressed off, maybe they could have an associated "off" preset something like is in Show Buddy. I realize this could get out of hand!