For me, it's not really the cost of the module, it's the lack of power out. This is an unbelievable oversight. My camera never makes it through a job without something being attached to it. The touchscreen is not good enough for focus so I'll put a small hd monitor on there and power it off a d-tap. If my client needs pro-res or avid files, I'll put on a pix 240 and power it off the d-tap. The same goes for lens motors.
So, yes the module is useless to me. It was included in the stage but the simple addition of a power out would have made it worthwhile.