My only input that I'd hope the Developers would seriously consider, would be to put stations (all builds) on timers. A timer equal to the tons of mats required would be fine, but It would look like NPCs are auto delivering stuff. However in reality, it's just a timer that players can chip away 1 minute per ton of the mats that are already in demand by being pro active in the build.
The problem is the scaling. 1 tonne per minute is approximately 10,000t a week, because the NPCs don't eat or sleep.
If you have a single colonised system and you're building a single construction in it, then 10,000t a week is pretty good, though a bit slower than a lot of players are hauling in practice.
If you've colonised three systems and you're running all of them at the five simultaneous construction limit, that's 150,000t a week deliveries, which isn't technically impossible but is quite a bit faster than most players actually do.
I think it would change the game from "gradually build up your system" to "claim as many systems as possible and leave them on autobuild while you claim the next one or do something else entirely"; if Frontier wanted the bubble to expand largely without player intervention they could have automated the System Architect role as well, and just had the BGS generate construction claims gradually which players can speed up if they want.
(In the same way that in the Thargoid War players
could speed up system recovery by repairing the stations, but hardly anyone ever did)
I'd like to see more options for the player to actively fill the cargo requirements than just hauling - trade in Building Schematics, defend supply convoys, have mission commodity rewards be delivered to a selected construction site, etc. - but I don't think there's any point in it being automatic.