DL's cabin music selection is a bit odd...
I would agree that something more instumental would be better during boarding, taxi, and deplaining.
That said, I am one of those people that thinks there is a song for every mood and situation. Often when we land, (especially if late) my mind goes to some up temp disco-ish type song meant to get people motivated and moving. Perhaps one of those great movie soundracks where there is some sort of chase scene.