You just caught yourself in the same trap everyone does becasue you think the answer is being elegantly complex and nuanced. Some years ago Hitech made something complex thinking that was what some of the community really wanted. Because it was complex no one bothered to use it.
Get the point of this.... Give him simple and he might go for it. Most of this community is out there for some piu, piu, piu. Not chess, or a head to head GO match with Cho Chikun. In 16 years, all of these strategic style of bomber target wishes are for a single finger button press choke hold to impact a whole country. The city is already nuanced as the core of the top down supply system. Very few people want to bother anymore. The want something that gives them a big payoff for right now, not three trips 2 hours from now.
The city already impacts the trains as it's reduced down towards 0%. Lower the city % then hunt the trains to interfere with the 10 minute windows they operate in. A rail yard cuts out the hunting and distributed part and gives a bomber driver a single finger salute to a whole country for flying to a single location. Why the city is so huge so there is a high value target but it does not allow one person to dictate to a whole country becasue it takes many more tonnes of bombs to reduce it to 0% than a single box of bombers can carry. Even with the city at 0%, strat resupply still takes place. This kind of wish wants to flatten the rail yard and make trains DOA to have a crippling effect on a whole country.
So back to yes, Hitech can incorporate a master rail yard into the city complex for the eyecandy. What is the point of destroying it as a special target if it is calculated into the city's core function for reducing to 0%? Then it's not a separate entity and does not choke hold all rail traffic as a master object. All rail traffic is only to the 6 other strats and not to country level feilds. So once again a terrain builder will hide the thing near the city and protect it like he does any strat along with Hitech will probably have Waffle put flak towers in the object. Not much fun at that point. And the unspoken part of the wish is for Hitech to change the existing game infrastructure to make this work becasue it would be neat to have??
How do you use what is there, not make it a game of chess for it to run, and use the existing system in a simple manner? Think about how the battleship was made operational. It needed a bridge, hanger, and officers club so you could get on it, choose guns, LVT, and PTs, and spawn into them. And be able to enter the O'Club like being in any tower which the bridge is. Only new 3D objects, the rest already existed becasue of the CV.
Hitech has a never ending todo list, we were introduced to that concept in the alpha\beta. This wish has been on the wish books for probably as long as I've been in the game. He already rebuilt the game from the ground up. And it appears he reuses his code everywhere he can. How do you help him see this is a good "something" without it giving one player control over 100 players most of the night. And not require him to create a whole new backend for the arena resupply program? Or require an AI to play high level GO with itself to control shades of nuance like roles of DnD dice for activity turns.
Simple is very hard.
I'm dissecting as much of the existing processes as I can to try and see it in small simple bites. You gents always end up building whole new games and ignoring trying to understand how the exiting structure even works before the post runs it's course.