For example, we dont have Ch4 S1 tag in galleries or prefabs, like every season. We need Frenzy Fields, Brutal Bastion with the snow nature (glaciers, trees, etc). We need Faulty Splits, Lavish Lair, Ritzy Riviera, Snooty Steppes, Pleasent Piazza, the Ch5 nature in general needs to get added to with his respective terrain pieces and trees. The Windmills and Classy Courts and thats all. In general, the people just want the Ch5 S1 Stuff (Underground). The train complete too, i hope they can make it as a device and add the Ch6 one too (From S1) or just like props. I prefer as a device. How could it be added? Simple. With the zip line system, we could create a customizable track system. As a second device, we would add one to create stops (setting how long it stops, when it slows down, etc.). And finally, once we have a closed circuit, we could spawn the train with its cars (we could provide options, such as how many cars we want for each). Hope they add this with the time 
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Hi Bestia,
There was a recent initiative to gather requests like that. It looks like most of your requests got mentioned.
I’d be most excited for Trains, the technical term for “the zip line system” is “Splines” - and I can say with certainty any train system would make use of splines.