Given the mind-numbing incompetence at work on this project, I have my doubts that 1. it will be ready before 2026, and 2. it will have the intended effect.

How many people take the very same (identical as in LA stole the plans) setup at MIA to be picked up or dropped off at MIA airport? Aside from redirecting ride-share and shuttles to a central location and consolidating the rental cars, I don't believe there was a measurable effect on private vehicle traffic at MIA. Given the higher volume of passenger car traffic at LAX, I don't see it making a dent - in fact, the best way to improve traffic flow at LAX would be to get rid of the traffic lights in the loop, move pedestrians onto bridges or tunnels away from the traffic, and come up with a better way to feed cars onto the loop road, and into and away from the curbs in front of the terminals to avoid backing up cars who are moving through to distant terminals, perhaps even adding an automated tolling system that will track cars and fine/toll those who idle at the curb, or impede traffic flow.

If the rental car facility is ready, they could get a jump start by copying SEA and opening the consolidated rental facility, removing the rental car branded shuttles, and just run a consolidated facility shuttle between the terminals and the new rental car facility. That would at least streamline that part of the arrival and departure process.