A use for the arrow buttons (qwerty keyboard)
I love the ease in editing with STEP and EDIT modes. Being able to press on a step, see all active notes, and hear a preview of the step is great. It makes creating complex baselines, melodies, and drum patterns (especially sampled breaks) much easier. It feels kind of like a tracker with the ability to hear a preview of each step.
I think that using the left/right arrow keys to move step by step through the track sequencer in STEP/EDIT mode would be brilliant. Moving through the notes would be quicker, and we wouldn't need to take our hands off the keyboard/controller. The up/down arrows could be used to jump to the next beat or bar. I can't stop thinking about how quick this would make editing.