i like this idea of hotlaping maybe instead of display times in lfs world or make all those regulations to mix with official (probably a lot of work) how about keeping mods separated from official lfs cars.
maybe an extra tab below multiplayer in lfs main menu "weekly Online Time Trials" with timer that display how much time left "ends in..." and it reset every week. u click the tab and it display mod picture, name and specs on top left the top right u see the track configuration, bellow that u have the leader board and its important that it display the mod current version, the idea is to use only approved mods (no bikes cuz its still beta, no bus, no truck..).
it can be single event or multiple events at ones maybe 3 or so, the mod and track config will be selected randomly every week meaning it happens automatically, if mod selected the "author" of that mod will not be able to update or delete it in till the end of the event.
i think this can bring a lot of fun into lfs but also will be usefull to learn how make better mods and improve setup handling, physics and quality of a mod base on community feedback.