Hi,
I have seen a few people discuss this on Facebook, and I did participate myself too but I feel it would be taken more seriously on the official forum for such questions/requests/demands, etc.
Honestly, the only downside for me with GSX Level 2, is the lack of control the user have over the passengers.
What I mean by that is, lack of control over the number of passengers, and lack of control over the type of passengers we would have board/deboard our planes.
I believe it would be more intuitive and more immersive, if the user had a GSX Level 2 UI that came with the expansion.
A parameters window where we could input the number of pax. and crew on board, and the type of pax.
Flight Crew: [4]
Cabin Crew: [8]
Passengers: [15]
Type of Passengers: [Random] or [Select]
And if we pick [Select] option, a dropdown list appears where you input the number besides icons of the type of passengers you (FSDreamTeam) modeled.
This is just an example of the way this could be implemented. Your developpers would know best how to do it.
Everything, of course, complient with the limitations you as developers face. I can only maybe try to ask what can be done or can't, but the last words are yours.
Aybars

Why give all of the control over the pax to airplane developpers? Would it not be possible to have it both ways?
We could either let GSX or the airplane devs do the math, or we are given full control over it as demonstrated above.