Right now, to me at least, managing vehicles becomes difficult and annoying when you have lots of them. For example, when you click on a deposit, you see a list of vehicles parking there (without any further info), and if you click on a vehicle and show it on menu, you see the whole vehicle menu, without highlighting the one you want to see.
So I’m not sure what qol features would be feasible and which ones would be easier to implement, but surely it’d be nice to have more flexibility when browsing them both on the vehicle menu and through parkings (more filtering options for example), easier ways to see which vehicles are assigned to what place.