harmony and Prefab hook are Mod depencies that allow other mods to do stuff the vanilla game does not allow, and by making them standalone mods it prevents incompabilitys which would result if every modder would solve these stuff themself, imagine a Street crossing, if every road comes with its own you get chaos
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2040656402
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=530771650

I use both without any issues i would have perceived
Here is my mod list without any know compability issues
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=3282703761
I can probably remove the prefab hook

Besides that you can raise the Pasengers for all vehicles, my Blimp Replacement can carry 500 People
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=3272305008
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Well you need to edit the value
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=964855740