I think this is really going to help thin out the traffic during peak time but hotel and rental car companies better be getting bigger buses. Those little Parking Spot cutaway shuttles are going to be inadequate. It will defeat the purpose of mode separation if Parking Sport or the hotels decides to send twice as many shuttles and clot up the newly opened roadway.
LAWA should really require them to operate at least 35 ft bus (that's the size of the Lot C bus). Hertz and Alamo/National operates regular low floor 40ft transit buses and I see them being filled to capacity on a regular basis. Some of them will probably have to switch to 60ft articulated buses soon.