Sorry I didn’t respond but I did read it and your idea has turned into something a bit different, but I think looks really cool. All 16 rhythms displayed at once!
It’s currently with my ‘designers’ (aka brothers) so might be ready for releasing soon. The second ‘inv’ button randomises the current channel (will be renamed). Also I’m adding a button under ‘sync’ so you can manually press to sync all the channels. The unnamed knob cycles through rhythms that are close to euclidean, so you’re not stuck with just euclidean.