Dan... I don't think you will see much demand from the WS community until you actually DO IT... Mostly, you are going to get interest from the arranger community, but most of us already HAVE decent arrangers.

But integrating WS's sounds and arp/loops with arranger ease of control and a musical flow (all WS loops need cuing up a bar in advance, unlike arranger fills which trigger immediately, but in sync with the music) could really peak their interest. But you are going to have to get it working first.