The issue is not about what ways can be used to avoid the problem. You said yourself that you could not promise when or even if it could be fixed. THAT is what is worrisome. And stating that sync and direct change don’t go hand in hand is puzzling, when other drum machines do it just fine.
The real problem, is that you’re building Overbridge on something that doesn’t work. I don’t understand how this is not a glaring mistake. I would like the discussion to stay on this point, as it is the heart of the problem. Why are you building something so complex as Overbridge, but basing it on a sequencer that doesn’t behave properly ? Not only for polyrhythms, but also for plain 4/4, as confirmed by some users ? What will happen when you finally decide it’s time to try and fix the sequencer ? How will that affect Overbridge users ? Those are the questions that bug me, and clearly, no one with a real answer is communicating with us on these forums.