There has been changed quite a lot compared to earlier games with the PAX distribution routines, oversupply warnings, frequent opening airport information page for grabbing slots and using small aircrafts for the wrong purposes.
Please check Samiīs official announcement forum for details.
Fares play a more important role than in earlier games, just "try and error" lowering/rising fares to get best results.
It will also take a longer time filling up your planes after opening a new route, since RI/CI are more important,too.
So route marketing may now be one way to speed process up as well as lowering fares.
Donīt even bother caring for that last answer, itīs nonsense.As you know, there always have been tech-stops.But new to it is a heavier penalty for using them.