The main reason most of the games are nearly the same (ATB, MT3, MT4) is because the game world starts as a mirror copy of what large airlines have done in real world, and it is set in stone. Delta's hub in Atlanta is the reason why it is the busiest airport.
AWS game world is static, tied to decisions of big airines. The airports and their slots are static. The decisions made by players in AWS do not make any difference on the game world.
Suppose the biggest airline that controls 80 to 90% of traffic in Atlanta shuts down, and there are virtually no flights in and out of Atlanta. In real world, people would find new connections to get to their destinations. The traffic of all the other airlines, and all other hubs would skyrocket in that scenario. Not in AWS. All the connecting traffic tied to Atlanta will forever be tied to Atlanta.
1.3 will not do a whole lot. But if Sami gets the "City based demand" and passenger connectivity off the ground, every game will be new and unique. Hubs will be where successful AWS airlines make them. Passengers will connect dynamically, based on availability of flights...
Hopefully, Sami can wrap up 1.3 ASAP so that he can shift focus to this new makeover of AWS.