In this update, there are several changes/new features aiming for a better controlling experience. Here's a list of what's new:
(edit 23 March): bugfixes
planes can make turns greater than 180 degrees; instead of just making the shortest turn to a selected heading, planes will now comply to instructions to turn 'the long way round', making turns up to 360 degrees possible
doubletap between heading buttons to easily instruct a 360 turn over right or left
switch between airports without losing progress
adjusted penalty for separation incidents; long duration incidents should now cause less skill reduction than before
tower is a bit more helpful; tower can reduce the speed of approaching planes that are too close to a preceding plane (when they're less than 10 miles from the runway); this may avoid some missed approaches
larger margins between departures and between arrivals, and adjusted initial climb altitudes for Paris and Atlanta, for a smoother traffic flow
button added in menu to switch the sidebar to the other side