It would be nice to allow all 4 sequencers to have a drum track. Perhaps the "Arpeggio" button on sequencers 2-4 could be an "Arpeggio / Drum" button. There would clearly be a technical issue which would probably make it impossible to have all 4 sequencers using the same Drum Gate outputs, so perhaps only the 1st Drum sequencer would continue to be the one that utilizes the drum gates, while the proposed drum sequencers on 2 - 4 would only send notes via midi in order to control VST drums (for example). It would be similar to the arpeggio functionality, but have the workflow of the drum sequencer.