I thought the arrows were pretty good - at least I could follow them pretty well, but then again I had ridden the course last year and am somewhat familiar with the area.
Re- rest stops I normally just use water and bring powdered HEED or perpetuem in a flask - so obviously pre-made HEED would be nice, but everyone's got their favorite, right?
Laminated route sheets would only make sense if you could reduce it to say a double sided sheet that could fit in a jersey pocket. That'd be neat, but not sure if it makes economical sense. I just folded it up and put it in a ziploc, not as elegant, but just as functional although I didn't really need to consult it.