Yeah, that's the message that it feels like they tacked on at the end in order to have something of a point. They did it at the expense of a host of undeveloped characters, stories, and themes. There was no proper explanation as to the nature of this eternal connection between certain people, there was no expansion on the significance of the Cloud Atlas sextet, no development in the apocalyptic scenario, no exploration of the Blade Runner-esque world, and some contrived anti-corporate/anti-Big Oil message clumsily thrown in for no good reason.
And they buggered up the slave/slaver story. The whole time it felt like they were establishing a bond between the two--like the "connection" wasn't always about romantic love but could also manifest as friendship--I thought that was a neat turn to take. But in the end, nope. It was all about the (ex)-slaver and his wife whom we don't meet until the last five minutes of the film. That one was especially character-driven, so it really ticked me off.
The whole film felt like a big presentation for a really cool, complex thesis that completely lacked any meaningful explanation or development. So in order to wrap up, they simply said "Oh. It was love." A great premise, and visually amazing, but one helluva freakin' letdown.