Just a couple of thoughts (sorry if any are repeats):
Voice controlled UI. By this, I mean spoken orders to control anything and everything. Making the commands modifiable would be a necessity.
No more repeated radio messages from the user radio when running a patrol from a saved game in mid patrol. In other words, get the game date and time correct in a reloaded game and don't replay every event in the events.ini file that has occurred since the beginning of the patrol.
No more CTDs when an event in the event.ini points to a non-existent audio file, just ignore the missing file. Same goes for any missing sound file, ignore it insead of crashing the game.
One folder for music for all radio stations and one folder for each radio station. If a particular stations music folder is empty, play music from the main folder (or even from the gramophone folder), if that stations music folder has music, play it instead.
And, of course, all the other suggestions that I agree with
