Is there already support for the drummachine and pattern sequencer?
Moss implemented a drumsequencer in a primary state using what he had available with the controller API (press Note twice).
I am tackling the drummachine but I spent a bit of time yesterday taking notes on what I needed to get it even close to what users expect in Live and Bitwig's API doesn't allow for most of the operations yet.
So for the time being it would have the bottom left scroll/play pad, top step sequencer. We can't change clip length or navigate into drummachine devices yet. As well as not being able to change step resolution, so as you can see it would be pretty limited right now.