While this sentiment is true, EPCOT remains too sophisticated of an experience to have a show like Harmonious. While the changes over the past years have watered down that experience slowly, its heart still remains (albeit barely), due to the fact that the blend of IP and Edutainment creates discordant emotions. It's very clear to even the most inexperienced of guests what the original message of the park was and is a recent addition. Due to that, it *NEEDS* a show like I:ROE to thrive.
IP could only work in EPCOT if it uses the edutainment to fall back on, adding to the park's original message. It cannot create a new message.
They want EPCOT to remain unique (to some extent), and in order for that to happen, the evening entertainment cannot be run-of-the-mill, nor can it fall in line with the IP. This is especially clear when other parks have similar shows that outperform HarmonioUS. The park needs an original score to tie these emotions together, without heavily relying on any theme of the park. It needs to be its own separate concept and emotion, which is one of the major subliminal aspects that made I:ROE and Tapestry so successful.
I think EPCOT needs I:ROE now more than it ever did.