Perhaps if possible add a way to customize your vehicles?
-Maybe add a mechanic role where you can customize and or fix vehicles for money
-add options to customize your vehicles in the car dealer menu
-everyone has access to colouring your own vehicles/or buddies
Ps: this is old news but most of the vehicles have delayed controls making them very hard to steer (this might just be because its gmod) but is there a way to fix this?