It's really difficuly to keep waiting when you don't know what you're waiting on.
Really a very good first step would be multiplayer and VATSIM support. Maybe even more than local ATC, since that ai is always limited compared to human interaction. The new ATC mod is something I won't be installing since it sounds mostly like it was in FSX, and as stated above - it's complicated. In real life I do enjoy some good RT interaction, but sims just don't cut it for me. So I hope for something amazing, or vatsim