I ran into a major issue with this whole set of assets. Whenever I have them enabled, no matter what else I've disabled, the game crashes to desktop whenever I attempt to load the asset editor. When I have all other assets and mods I normally use enabled (including NExt2) but disable this collection, no crash. I can send the crash report if that would help you troubleshoot the issue, just let me know how you want me to send it to you.

If it is still occurring, could you unsub and resub to be sure you have the latest changes, if it still happens after that, let me know and I'll look into it.

is it possible to fix the median so that Vehicles respect it?

Vehicles ignore the median