I have been WAITING for ride-sharing pickups to be available from LAX for what feels like ages. They've actually implemented a pretty sane system - ride sharing services have marked areas that they can pickup from but they can drop off anywhere. You request a car and the ask what marked area you are near, then they show up there, it doesn't get much easier.

Taxis still aren't focused on the customer in LA and I don't think they will ever be.