I get the impression that the rationale is arriving aircraft are noisier than departing aircraft, and more people live west and south of the airport than north and east.
06 landings are no great loss, they require more track miles unless inbound through WAVES, which is usually only intl heavies. 24 departures wold save a few miles if outbound through GURAK or WAVES but not much, especially when you look at how convoluted the GURAK SIDs are.