There's often a lot of nuance lost in translated subtitles as well, in my experience, often because dialogue written for one language can't be coerced into natural dialogue in a different language without significant changes.
Keeping the original audio track does preserve the direct relationship between the actor's tone and expressions, of course, and it could also be something closer to what the original makers intended even if the voice actors in a dub also do a good job.
The audio track also feels somehow more right and authentic when someone who's supposedly Japanese speaks Japanese, or when a supposedly French person speaks French, or when people in a show set in California speak English rather than somehow magically speaking your native language.
Then there's of course the question of dealing with scripts that have multiple languages spoken in them. Something would surely be lost if multiple languages were dubbed into the same third language. It's often easy to recognize the different languages being spoken even if one does not understand them.