It’s still mostly the same ATC system that it was 15 years ago.
If you and others are fine with that, fair enough. But is it so bad to want some major improvement in regards to ATC? It’s not even tied into the multiplayer aspect of the game.
Now if Asobo stated that they kept ATC as is to not compete with VATSIM or something along these lines, I’d be fine with that. But I don’t believe that is the reason for leaving the system largely untouched.
As you said it needs a TON of work to be more realistic, and sadly that has not been adressed in 15 years.