Brain Fade,
regretably the six mile spacing for everything is a necessity due to the lack of highspeed turn off/ons leading to much higher than normal runway occupancy times. As it is the phrases "Expect late landing clearance" and "Line up be ready immediate" are becoming so frequent we're thinking about putting them on the ATIS. Besides there's little point in bombing down the approach at 250 knots 3 miles behind the previous only to be told your stand is inevitably occupied.
