After having done some IFR-flights, I suggest a Change in the direct-to-Dialog to accelerate Input:
1. Put a textbox for typing the waypoint right on the topmost Corner of the direct-to-dialog
2. Force the Focus to be set into the TextBox when the Dialog box opens
3. leave the list of Airports/waypoints in the vicinity as it is now.

This will simply save a few taps until you are in the search box.
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I'm definitely open to improving the Direct To window. It currently provides at least two functions, maybe three. We'll think about it and input is always valued.