*Elderly voice* You damn kids have it so easy nowadays! Back in my day, we ain't have none of 'dem fancy-schmancy railway-ma-doo-hickeys or any of 'dem mounts! We had to walk miles and miles to get to wherever we wanna go. Lanterns had purpose in those days! >:|
For those curious, this is the layout of the tracks:
They will circle the outskirts of the overworld. However, there will be a central hub station in Graal City. Here you will go underground and there will be tracks that go in different directions. These tracks will meet up with the outer track system in the caves(as to not have an excess and confusing system on the overworld). So while the overworld system seems bare, most of the navigation will be done underground... of course with signs to tell you which track goes where.
Before it was just a jumbled, lethargically twined anaconda of steel and rudder. Now you've created a well organized super system of transportation. It's not like anyone is gong to miss those unnecessary loops and twists of the train.