I agree the OS could be a lot better, and could be much easier to customise (may be you can but we just don't know how, yet ... )

I know you can only see one category/sub-category at a time, but the sub-categorys don't have to be exclusive. For example, you could have two categorys, one with the red light cameras on one without, the non red light cameras would be duplicated. Of course you can only have one visible icon, which is poor, but at least you could filter the cameras a bit. Another obvious sub-category is the mobile cameras, but the number of combinations rises quickly the more sub-catagorys you have.