With the new Big Bird update, planes now only require a certain distance to takeoff. For example, a GA plane on a medium runway will taxi up to the GA takeoff point, and takeoff from there.
What I think should be added is the ability to define certain taxiways for certain aircraft types only. As of right now, a GA plane will always taxi to the end of the runway, even if there is a runway entry point right next to where the plane is to takeoff from. If there could be a system similar to the directional taxiway system, it’ll be more realistic as there won’t therefore be small or medium sized planes taxiing on the runway for takeoff.
Similarly, a GA plane could affect the flow of ground traffic, as planes have to wait for each other. Planes will always take the shortest route to my knowledge - this sometimes causes a backlog of planes on a runway. If we could define that Taxiway Alpha was for medium and large aircraft only, and that Taxiway Bravo was only for GA aircraft, it may be better for some airports.
I hope I made sense and I hope this would be implemented - it would definitely add a somewhat new level to the game.