It will be cool if we could do some delivery mission. Your in freeride and you can do some mission base on your current vehicle (taxi, amazon delivery...) It's not difficult to implement (It's still a very long and difficult process but it's simplier than a carrier mode) and could bring some new gameplay.
I had a similar idea a bit ago and I like it. https://www.beamng.com/threads/taxi-routes-bus-routes-but-with-all-vehicles.71185/