Quite a simple one (I hope, at least). My suggestion is simply to be able to share presets with other people or make it so presets don’t reset when other people get into your vehicle (so you can get in someone else’s car, apply preset and have it stay for them so they can save it for themselves).
I personally love racing with realistic handling presets so having the ability to quickly send these over for other people would be great! I’m sure those who enjoy drifting and want to share presets with eachother will appreciate this too.