The next step with reason should be that you design a special Hardware Controller with Balance integrated, so it feels more like hardware.
And to revise the GUI, for higher resolution displays. I find it to small.
Midi Editor should be revised as well. Editing precisely is not always possible without zooming. In programs like Reaper, zooming and editing works very well and slick (zooming is not often necessary). I don´t find all these tiny screen elements accessible. Ok, perhaps one day:-)