What will be of interest is which other carriers will pick up the routes
Unlikely any of these routes were sustainable in the long term. You can't create endless demand with just low air fares. Even if the flights were free business travellers need to have a reason to fly and leisure travellers incur other costs aside from the air fare so there is a finite limit to market sizes. Looks like the penny is beginning to drop with FR! Taxes are just an excuse.