The pain and suffering will be yours when you hear how out of tune a violinist attempting to play in Eb minor is. Moving it down a half step would make it sound substantially better without changing a note, and no one in the audience will know the difference. Why is making the performer work harder important to you as a composer? Who does that benefit? I would think that, if you want people to play your music, you would want to write things that sound good and are rewarding to play. Putting bowed strings in six flats is an effective strategy if your goal is to miss both targets.
