This system allows you to create massive fleets, without the restrictions of the real world. It does take away from the pleasure of creating something that could be real. Runway lengths and landing rights are not factors in this system, so you can land the biggest plane you can buy anywhere. Even my little Potez's need more runway then some of these airports have, and the jets need at least twice as much. I've got competitors flying Tu-114's and 707's into airports my plane shouldn't be able to land at!
The other issue is landing rights at domestic airports, it just can't happen like it does in the game.
This system seems to be heading in the right direction, and I enjoy it, but it is way too easy.