I'd prefer:
- System design: Environmental Storytelling
- Travel times: Perfect as it is!
- System connectivity: Streamlined (for more action bottlenecks)
Overall I think the current state is really well done. I'd move on with the story a bit to spark some interest. Perhaps in the form of conflicts.
The events you've been doing recently are really good! Like the cardamine crisis and the monsoon on Kyushu! Keep them coming!