Are demonstrative musical controllers and adequately expression-capable controls at odds? (Gestural control can never be analogous control.)

With the rise of laptop orchestras, digital instruments, and human-interface-controlled music, the want for 1. obvious and demonstrative user-control devices and 2. an intuitive connection between performer and sound, 3. a visual stimulant for the audience's sake,  has emerged. As digital instruments become more complex in their sonic capabilities and musical expression, the means to [...]