I feel so indifferent towards this whole thing. To me, Harmonious is a show that served no purpose beyond just existing. Did I enjoy the soundtrack? Sure. Did it belong in EPCOT? No, I don't think so. Did that stop me from listening to the soundtrack in my car on my commute home from work? Definitely not. It had its moments.
I'm not happy or sad to see it leave. If anything, I'm celebrating the removal of the barges more than the departure of the show itself. It was doing the bare minimum to justify its existence in that park, but it's nowhere near as bad as some people were making it out to be. As others have stated, it needed some tweaking like an overarching score, and adjustments made to the "story" to help the flow. I think it's arrogant to assume that "nobody will miss it" because although I may not myself, I can at least acknowledge the fact that people did enjoy it. It was an objectively bad show but it's done and over with, there's no need to insult the intelligence / taste of those who may look back fondly on it.