My suggestions are:
- cargo and charter;
- maintenance and cargo facilities;
- a better slot system (be able to buy other airline's slots, negotiate slots prices with the airports, negotiate landing fees and etc);
- be able to sell and lease airplanes directly to other airlines, and also be able to store the airplane;
- more detailed maintenance information, like the different kinds of maintenance and costs for each checks;
- a better system for cabin configuration (seat pitch, seat type, how many seat abreast) and, if possible, that it was more visual. This is kind of crucial since many of the cabin configurations made available are often unrealistic and be able to configure it more linked to how much of available space we have, would be a lot better for everybody;
- other buildings like the Headquarters for the company, cargo distribution centers in the cities, local branch offices and etc. All of those building could be sold, leased or even used together under a agreement. All this building would contribute for the company's reputation. Also the price of construction and maintenance would depend on its size. Depending on the size, the company could allocate a certain amount to operate that building. Additionally, create lounges in the airports would be nice.
- frequent traveller Programs, To be set much more like IFS is, with different types and such;
- subsidiaries that would be new airlines, hotel networks in the airports, catering companies, maintenance companies and etc. All of them would help the airline to get more revenue by selling its services and also to cut costs with in flight service, maintenance, flight crew and cabin crew placement and etc. All of those buildings and subsidiaries could be sold separately, or leased to other companies.
- addition of ATC restrictions due to how many flights are being operated in the airport or in the region, so it won't depend only on the slots available ate the airport.
Well, I think those are my suggestions and also what I like in this game. The addition of buildings and Subsidiaries do not increase incredibly the micromanagement as the Timetabling feature would. I think the timetables have to be put in the new version only if it make a real difference, and even making much difference this would add a incredible workload for the Player (
