The changes allows more freedom of how players can customise their trucks. Although, I'm not a fan of heavily save edited trucks. I still do a little save editing myself. I like to keep my trucks looking clean and mostly stock. Although sometimes I'll add hidden roof bars etc... So it looks as though the lights are attached to the truck, not a bar. This keeps it looking realistic, a lot more cleaner than having a roof bar. You can do pretty good things with save editing, although some people take it to the max.