Yes, both points make sense. And I assume the 10s latency is also geographically related - i.e. it's worst case 10s for the longest distance on the network topology graph? That should be fine.

Low latency requirements also tend to be geographical, I think - stock markets are mostly specific to a single country, examples like ticketing are usually specific to a single city / edge. For general news being broadcast globally, that kind of latency is fine.