Ones which I have not found after searching:
-I noticed grills and vents have textures which are stretched when the grill and vent is enlarged. I think it would be a simple small fix to make it so the texture “loops” and takes up the whole vent by having multiple photos of the texture side by side rather than one stretched photo.
I don’t know if I’m being clear in my explanation but basically what I mean is if this dot “.” is the texture and ] is the grill the game does this:
. ] --> _ ]
rather than:
. ] --> … ]
-Customizable text on Cylinder Heads, it says “Automation” on it usually, but why not make it so you can type out your company’s name or the model of the car on it along with custom badges if those are integrated!
-This is probably in your future plans, but a system to organize cars so that you can have a car Model declined into multiple versions with different engines, fixtures and interiors, wheels ect. The revision system exists, I realize but you can’t name them.
I’m talking about a system where each Model is like a drop down menu, with 2-3 platforms to accommodate different types of cooling and such and then different final models based on these platforms. That way you could have a model evolving over years and varying according to the sub-model you pick (Regular, Sport, Turbo ect.)
As well as picking color schemes for each final model, and being able to put a car on the market sold in 3-10 colors. I guess this is not implemented yet since Sandbox does not have much use for it, but I think it would still be nice to have it in Sandbox so that cars aren’t “stuck” as being one color.
Ideas which have already been suggested (just to let you realize that more people care about some suggestions than you may think, if that might influence your decision):
-Race Cars, but I mention it because I believe my thought on this might be slightly different, I think three things are really necessary for this:
–> My suggested Model Organization Idea: That way the most high-end brute model with the most extreme engine could become the race car
–> Decals! As suggested by others before, perhaps included in the game or imported from images, to give the cars a look
–> A basic race system, put something like 10 tracks (which you draw out) and each one tests cars in a specific fashion (a combination of top speed, acceleration, cornering), and based on calculations, and available technologies at the time, but also a random variable to factor in luck, decides whether you win or not, without necessarily having to ever show the actual race. I’m not a crazy programmer, so I don’t know how hard this would be to implement, but you could have an initiative where people design the AI competitor’s race cars and the best 10 for each time period are picked, and these are the cars you race against.
-New Paints, a color palette system, with different finished like matte.
I hope these suggestions don’t seem silly, and I’d be happy to help for anything you think I might be able to help with! (I’m essentially just good at drawing and photoshop kind of) 
