As a huge, huge fan of Reflections of Earth, I do feel it is disingenuous to assert that it had a strong story or narrative that held the audience's attention. Let's be honest here - while I'm aware that it does technically have a narrative, it was very abstract. So abstract that the vast majority of viewers have no idea what each segment is supposed to represent.
But what it did have is an overarching theme and vision. The entire show was one unified piece meant to be taken in it's entirety. Though most viewers did not key in to the narrative, almost everyone got the tone and the message of the show, and the unified nature of it's production, better pacing, and continuously introducing new things to the audience is what primarily held people's attention. Sure, many thought that the globe segment was boring, but it still held your attention as a first time viewer because you watch wanting to know what is going to happen next.
With Harmonious, knowing you can zone out of a particular segment because it will be over in a minute or two before the next one starts, combined with no overarching theme or unified vision, well.... you know. It makes for an unengaging, overly long show that doesn't hold your attention.