Hi All
In all honesty, I don't think we would be able to provide a perfect passenger set for everyone, and right now the vast majority of platform assets only support 1 passenger set. The current set isn't necessarily perfect, but I think they fairly well fit modern passengers (even if having such a small set of objects in passenger commodities can result in some of the 'odd' poses repeating a lot). One thing I've personally noticed, looking through high resolution people objects that are available at reasonable prices (ie not hundreds of dollars per person!) is that most are either using a standard pose (either standing with arms straight at their sides, or T-posed for animation), or have some form of 'catwalk' pose.
In regards to the actual 3d scanned people used for 3D printing in some fields such as model railways, I have tried contacting a couple of groups regarding this in the past (albeit quite some time ago), but so far none have been willing to work with us as they are extremely protective of their work. It's not currently viable for us to go about 3D scanning people ourselves, and the cost of hiring a group to do this is simply too high. So we have to fall back to using available models for the time being. That said, we will continue to look at other potential sources for people, since it is something that most people will be wanting a wide variety of them, and there's of course nothing stopping content creators from making their own passenger sets of they so choose.
As to using the legacy passenger set, the change will be a local change only. So another user downloading the route who does not have that change would see the newer passenger set on the route.
For being able to change the passenger set in-game or similar, as per my previous reply:
We do have a task in our system to look into options for making the passengers set by region, or similar, however I don't have any timeframe for when any changes may come along for this.
Beyond this, the only work around right now, without making additional assets, for those who absolutely want to see the older passengers on their routes is to edit the passenger asset as per my previous reply.
For creators who want to offer both in their traincars, this can absolutely be done by simply adding the legacy passengers asset to the queue's configuration.
If you can obtain permission from a creator to clone their platforms, then you could also specify the legacy passengers on the passenger platforms. But of course, this will require you to make clones of any platforms you wish to use in this way and obtain permission to release those clones.
Regards