I flew into LAD last week. I had the impression that, on arrival, things were a bit better than before. It looks as if they cleaned the immigration waiting area a bit. Also, less mosquitoes (but maybe that’s a seasonal thing). Other improvement: there were now 2 medics available to look at your yellow fever papers and stamp the entry form. (Previously there was always one poor fellow that got completely overwhelmed when they dumped 200+ people in front of him…
)
But the lines for immigration are still as slow as before…
One tip I can give you: check the schedules for the few airlines that fly there and avoid the days when several flights arrive more or less at the same time. (I personally avoid arriving Tuesday morning: AF and TP arriving more or less together…)