You can't really argue that people should first buy a product that is unusable to them just so they can make suggestions on how to improve it. You might look at it the other way round: listen to potential customers first and cater to their needs, then they will turn into real customers and your sales will pick up - and everyone will be happyOh, you're a customer now? I must have missed that sale go through.
You have already lost precious years due to your stubbornness, interested people have been telling you for years your GUI is not so good. Instead you keep defending it while the biggest advantage of your synth, its sound, is losing more and more ground against the competition. You should have totally redone the interface years ago.
While I don't like Bazille's interface, either, a sober, functional GUI like that Dominator thingy combined with Poly-Ana's sound would attract a lot of people, including myself. You might find Dominator bloody ugly, but I think you are clearly in the minority. Maybe your way of thinking is just not nearly as representative as you think...
I am not against you in any way, to the contrary, I want to help you...