Had never really thought about this before. There was a Southern California Metroplex airspace redesign effort about 5 years ago then implemented 2017-2018. It looks like the FAA considered inputs through 2021 in that design plan. As part of that they dropped the inbound for larger jets over Santa Monica from 8000 to 7000 ft -- that is where the wide-bodies are when they fly over my house. Then the Beechcraft type planes on north/south crossing routes over the LA Basin are between 4000 and 5000 ft. There probably will be another redesign effort in a few years that considers the airspace post the Santa Monica airport closing in 2028. Maybe they would drop the larger planes to 5000 and the smaller ones to 3000? Have to look up how many decibels that would increase the noise? But the north/south transition is still coming from/on the way to crossing LAX, so not sure how low that can really go? And then you need spacing between those paths and the larger planes coming in. Will definitely keep an eye on it and if the planes were allowed lower and possibly turning to LAX sooner - before downtown -- it would be a noise issue for the entire westside of LA, not just Santa Monica.