Honestly, Disaster Looming is what I wanted for all the ambient tracks in the game. If a wild Pokemon spots you or you pass near an Alpha, the nice music that was playing jarringly cuts out, and you have to listen to the "Spotted!" theme until you move out of range or sight. Makes it kinda annoying to travel around and enjoy the soundtrack if every 20 seconds you hear "!" *angry Pokemon cry* "Spotted!.mp3"
Disaster Looming makes it so that those themes are incorporated into the song itself, so there's no annoying music transition.