For the western side of Mitte I took a similar approach to the eastern side, drawing the rail lines toward the center putting up stations and villages at the intersections. The result was not as neat as for the east, though. Here's a shot showing most of the rail structure.
I build seven new districts at or near rail intersections. Some of the more varied ones:
The University district on a island in the river. This one needed two rail stations to handle traffic.
Here's a high-rise district which I've placed up against open space for variety.
Here's where all the rail lines intersect. This is not yet heavily developed but it will be soon.
Coming up next: a central park area and surrounding neighborhoods.