Maybe I wouldn't if you applied the same standards to Yamaha that you do for others... If having to use a computer for some much needed editing is a dealbreaker for you on a Roland, it should be a dealbreaker for Yamaha, too.

Style assembly seems to be a mantra of yours lately re. the Roland BOTL's. I guess I would feel a lot less 'defensive' if you were as vocal about having what HAS to be done on a computer for the Yamaha's be included in its' OS as you are about the Roland...