Ideally we would have separate routes and separate approach patterns for helicopters. They then could use their attributes and their unique equipment. However at the moment we use fixed wing certified approach aids and runways and we have to share them with our fixed wing brethren.
You cannot come down an approach at Vy and come to the hover at the threshold with a radar controller feeding fixed wing into the approach at two minute intervals behind you. You have to go with the flow. That's why we did 140 knot approaches at Hong Kong. (In a S76)