Hey there, I am not sure if this has already been mentioned!
I was looking at Washington Dulles airport and what I noticed is that it has more than one tower controller.
Each controller controls one section either North, South East, or West of the airport.
So I thought that it would be great if Infinite Flight allowed more than one Controller to control the tower facility only on multiple runways airports.
This would be useful for special events where traffic is heavy since two controllers could divide the workload.