There should be a type rating choice for airliners in career mode. I should not be forced to fly the 737 as the only options for passenger transport. It would be more realistic and more fun if I could get a type rating in a family and fly the planes of that type.
For people that are familiar with the 737 this may not be a problem, but those of us familiar with the A320 are just forced to learn a completely different airliner now. Not so fun.