Add a way to add more coverage areas because I would like to cover a new area without messing with my current one. I want to have two dispatch centers.
You can already do this.
Make sure one area is covered by one dispatch centre and the following option is selected, found when editing a dispatch centre:
Create your own coverage area. Stations belonging to this dispatch center are considered for missions in the assigned dispatch center area.
The you can place another dispatch centre for another area and select the same option, this will limit what you get in both areas to only what they can handle.